Dissertations / Theses on the topic 'Polymères de coordinati'
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Andriotou, Despoina. "Synthèse de complexes et de polymères de coordination avec des cations de métaux de haute valence (Nb) ou d'actinides (Th,U)." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILR001.
Full textIn this thesis work, we explore the chemistry and reactivity of high valence transition metal cations (4+ and 5+) as well as tetravalent actinides towards carboxylate ligands and the possibility to isolate multidimensional metal-organic frameworks.The first part deals with the chemistry of a poorly studied metal, the niobium at its +4 and +5 oxidation states. The reaction of niobium(IV) tetrachloride precursor towards pyridine-dicarboxylic acid ligands in different organic solvents leads to the isolation of four complexes with discrete 8-fold coordinated Nb(IV) mononuclear units, for which the d1 configuration has been analyzed by magnetic measurements, EPR and XPS. The reactivity of the pentavalent ethoxide niobium(V) precursor has been investigated with a series of mono- and poly-carboxylic acids ligands, by controlling the hydrolysis rate. A total of twelve crystalline coordination complexes has been isolated with variable molecular {Nb2O}, {Nb4O4}, {Nb8O12} and {Nb12O21} cores, by successfully controlling the condensation process.The second part is dedicated to the crystal chemistry of four novel thorium(IV) coordination polymers, which were isolated by using 4,4'-azobenzenedicarboxylate and 3,3',5,5'-azobenzenetetracarboxylate ligands with the help of monocarboxylic acid ligands as modulators for improving the crystal growth process. In parallel, mixed Th-U carboxylate compounds were prepared with a ‘prior to synthesis' substitution procedure, for three distinct systems, involving 9-anthroic acid, amino derived 4,4'-biphenyldicarboxylic acid and fumaric acid. They were studied under SEM-EDX to determine the efficiency of the substitution and thermal calcination led to the formation of solid solution Th1-xUxO2 oxides. Full characterization study has been conducted for the different phases (single-crystal XRD, PXRD, IR, TGA, SEM). The adsorption capacities were analyzed with N2, Xe, Kr, CH4 and CO2 gases for the samples exhibiting porosity (mainly for Th-based compounds)
Lapprand, Antony. "Conception et propriétés photophysiques de polymères de coordination et de polymères organométalliques." Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2031/document.
Full textThis work focuses on the design and study of photophysical properties of coordination and organometallics polymers. Initially, we focused on adducts formed from copper(I) halides (CuxXyLz; X = I, Br, Cl). Indeed, these compounds have great structural diversity depending on the synthesis conditions (nature of ligand, stoichiometry, choice of solvent, temperature...) and various luminescence properties. We focused on the synthesis, physical and photophysical characterization of copper(I) halide adducts based on monothioether (RSR) and dithioether (RS(CH2)nSR) ligands. Then, we extended our study to the adducts of copper(I) halide coordinated by phosphorus P-chirogenics ligands (ie chirality carried by the phosphorus atom) and then to CuX adducts coordinated by both phosphorus ligands (PPh3 or dppm)) and mono- or dithioether ligands. Secondly, the impact of the incorporation of P-chirogenics ligands (P(C17H35)(Ph)(i-Pr)) on the photophysical properties of organometallic conjugated polymers 1D based on platinum(II) and arylbisethynyles ligands (-C≡C(Ar)C≡C-) was investigated. This type of polymer based on platinum(II) is often used as a model for the understanding of excited states energy transfers. These polymers, once characterized, were compared to the achiral analogues containing the fragment of trans-Pt(P(PBu)3)2 and several differences were noted. The findings and conclusions on the structure-property relationship are useful in the future design of photonic materials bearing chiral groups
Larpent, Patrick. "Tectonique moléculaire : conception et formation de polymères de coordination chiraux." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAF044/document.
Full textThe synthesis and the use of porous chiral coordination polymers for enantioselective processes are of current interest and prime importance in chemistry. These crystalline materials are mainly obtained by combinations of well-designed organic tectons and properly chosen metallic components. This thesis deals with the synthesis of organic chiral building blocks and their combinations with a variety of metallic salts leading to chiral coordination networks. In a first part, the use of tectons bearing neutral coordinating sites is described. Homochiral cuboid architectures displaying monodimensional channels are presented. In the second part, mono- and bi-dimensional networks of various geometries are described. In some cases, within crystals, interactions lower in energy than the coordination bond are observed and are responsible for the formation of molecular networks of higher dimensionality. Finally, the use of organic tectons displaying charged interaction sites is presented. Their combination with metallatectons under thermal treatments affords robust tridimensional homochiralarchitectures displaying cavities. These materials are interesting candidates for enantioselective recognition and separation. Their gas adsorption propensity (N2 and CO2) is briefly discussed
Bechu, Damien. "Polymères de coordination cristallins conducteurs à base de dérivés du tétrathiafulvalène." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAF018.
Full textPorous coordination polymers or Metal-Organic Frameworks (MOFs) are crystalline architectures displaying interesting properties such as gas storage, gas separation and catalysis. Investigations described in this PhD dissertation focused on a property less explored for these materials, using coordinating tetrathiafulvalene (TTF) derivatives: electronic conductivity. Two approaches have been studied to promote an efficient conductivity pathway. In a first part, a series of symmetrical coordinating TTFs bearing thioether-pyridine or thio-pyridine spacers were synthesized. These TTFs were then employed for the formation of interpenetrated systems to generate stacks of electro-active moieties in the solid state. In a second part, a dissymmetrical TTF was developed and implemented in an alternative approach involving the formation of stacks of sulfur-rich units through interdigitation. This strategy allowed the synthesis of two isostructural materials. Studies of the oxidation state of the TTF within the networks were performed by EPR spectroscopy, followed by measurements of the electronic conductivity of these networks. In a third part, the interdigitation approach has been successfully extended to homo and heteroleptic dithiolene complexes
Nguyen, Thi Le Anh. "Synthèse et caractérisation de polymères de coordination présentant des propriétés redox." Versailles-St Quentin en Yvelines, 2010. http://www.theses.fr/2010VERS0050.
Full textThis thesis is devoted to the synthesis and characterization (structures and physicochemical properties) of novel crystalline coordination polymers (also called MOFs), either porous or not, which possess redox properties. Two approaches have been developed in order to obtain such materials. The first one is based on the use of redox-active ligand (TetraThiaFulvalene TetraCarboxylic acid or (TTF-TC)H4), the other on the use of an active metallic cation (titanium). Conventional hydro- or solvo-thermal synthesis allowed the preparation of few solids, in which the redox centers adopt their classical oxidation state (TTF0, TiIV). Their structures, as well as their thermal and structural properties have been studied. Their redox properties have been exploited by means of post-synthesis processes (photoreduction or use as electrodes for lithium ion batteries). Using coupled electro-hydrothermal conditions, another solid was produced, this time based on the oxidized form of TTF-TC. The properties of this solid, among which its electronic conductivity, have been evaluated
Kerbellec, Nicolas. "Polymères de coordination à base de Terres Rares : porosité et propriétés optiques." Rennes, INSA, 2007. http://www.theses.fr/2007ISAR0009.
Full textWe have developed a computational method that allows us to estimate the potential porosity of coordination polymers. This method, based only on crystallographic data, leads to a value which does not depend on sample geometry. It is particularly useful for studying coordination polymers with low thermal stability. It is also useful for comparing the potential porosity of materials with complex networks. We have been then interested in the development of lanthanide terephthalate compounds. All these compounds present only two type of crystallographic structure and one of them contains thirteen different lanthanides with the structure Ln2(TER)3(H2O)4. These compounds have been more particularly studied. We have synthesized nanoparticules using polymer encapsulation technique. Then we have worked on a new type of compounds which simultaneously contain several different lanthanides. The synergy between the different lanthanides ions leads to new compounds exhibiting original properties
Chelebaeva, Elena. "Polymères de coordination d-f cyanopontés aux échelles macro et nano-métriques." Montpellier 2, 2009. http://www.theses.fr/2009MON20216.
Full textThe goal of the present research is the elaboration of new approaches for the synthesis of multifunctional materials displaying magnetic and luminescent properties both in the bulk and at the nano-level. We will describe some approaches for the elaboration of multifunctional nanoparticles in order to prepare organic and aqueous colloids containing magnetic or luminescent or multifunctional nanoparticles. First, we will propose a new approach for the synthesis of multifunctional cyano-bridged coordination polymers with magnetic and luminescent properties on the basis of transition metals and lanthanides. We will present the synthesis, structure and magnetic and luminescent properties of coordination polymers of general formulas LnM(CN)8 and Ln0. 5Ln0. 5'W(CN)8 (M = Eu, Tb, Sm, Gd, Er). Then, we will present the elaboration and studies of the physical properties of nanoparticles of cyano-bridged coordination polymers Mn+[M'(CN)m]3- (M = Ni, Mn, Cu, Fe, Tb, Sm, Eu, Gd ; M'=Fe, Cr, Mo, W ; m=6 or 8) soluble in organic and aqueous media. These nanoparticles may be stabilise (i) in colloidal organic solutions through the use of stabilising agents or ionic liquids or (ii) in aqueous solutions utilising a soluble matrix of chitosan or soluble organic polymers (PEG, PEG/PPG/PEG). We will describe also multifunctional hybrid nanoparticles obtained through the linkage of coordination polymer nanoparticles Ni2+/[Fe(CN)6]3- on the surface of mesostructured silica nanoparticles containing a biphotonic chromophore
Clarisse, Jade. "Croissance cristalline de polymères de coordination : synthèse, suivi calorimétrique et caractérisation structurale." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10269/document.
Full textPorous coordination polymers so called Metal Organic Frameworks (MOFs) are considered for promising development and applications such as in catalyst. However, the understanding of the synthesis mechanisms and crystal growth is a challenge. Currently, only a few in-situ studies have been done to rationalize the synthesis of MOFs, such as monitoring by nuclear magnetic resonance, mass spectroscopy and energy dispersive X-ray diffraction. In this manuscript the differential scanning calorimetry is proposed as an easier technique to implement that allows a continuous calorimeter tracking to identify the phenomena which govern the synthesis such as the formation reaction and crystallization temperatures. With such thermal analyses, the temperature range of the reaction was determined and the importance of various parameters influencing the synthesis was studied, such as heating temperatures and cooling speeds or reactant concentration. This was applied to the synthesis of new porous coordination compounds based on porphyrin acid derivative in order to understand the important reaction steps. Crystal structure determinations show that some are Porphyrin Paddle-Wheel Frameworks. New approaches to the MOFs synthesis are also proposed using organic ligands like acids, imines, oximes and Schiff bases
Puget, Marin. "Synergie magnéto-optique dans des polymères de coordination à base de lanthanides." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S079/document.
Full textLanthanides are more and more studied by the scientific community and their use in devices and operating materials is exploding. These elements are indeed known to exhibit remarkable magnetic and luminescent properties. They are indeed particularly effective for the creation of singles molecule magnets or light emissive materials. In this thesis work, the synthesis, the crystal growth and the magnetic and photo-physical characterizations of new complexes that associates lanthanides and photo-active organic molecules are studied. The latter possess a " trans " and "cis" conformation and it is possible, thanks to a bright UV irradiation stimulus, to switch from one to the other one. This photo-isomerization leads to a modification of the properties of the complex in which they are part of. In the first part, four new complexes with DyIII, EuIII, TbIII and SmIII are presented. They are obtained thanks to the association of precursors of lanthanides and an organic molecule from the stilbene family: the 4-styrylpyridine. A strong modulation of the optical properties of these compounds led by the isomerization of the ligand is observed. It is highlighted that this one has a notable impact on the luminescent properties of these four compounds and on their color emission. Then, the influence of this isomerization on the magnetic properties of the complex with DyIII is studied. The second part consists of the extension of the study in lookalike photo-active molecules. The aim of this work is to characterize the influence of the change of a given chemical group on the photo-isomerization properties. A ligand that is closely related to 4-styrylpyridine containing a dimethyl-amino group, is associated with a DyIII ion. A new complex is obtained and its magnetic properties in the solid state and in solution are studied. Besides, the use of a new molecule containing a diethyl-amino group as well as an azobenzene part gave rise to two new compounds with DyIII and with TbIII. The impact of the isomerization of this ligand on the luminescent properties of the complex with TbIII and on the magnetic properties of the complex with DyIII is then studied. In the third part, the perspectives of evolution of the subject are presented. A first strategy consists is to use less protonatings solvents than the chloroform to observe a stronger photo-isomerization. The second strategy is to use a photo-switching magnetic ligand. A radical of the nitronyl nitroxide family substituted by a stilbene group was synthesized and coordinated to DyIII and TbIII ions. Their photophysical study is commented
Assi, Hala. "Nouveaux polymères de coordination à base de titane et de dérivés phénoliques." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLV072/document.
Full textCrystalline Metal-Organic Frameworks MOFs are one of the most recent classes of crystalline porous coordination polymers. Due to the variety of their structure and composition, they are currently considered as promising candidates in various domains (gas storage, fluid separation, catalysis, biomedicine…). However, the literature on the photocatalytic activity of these solids has exploded only very recently, although the many advantages of using these materials as heterogeneous photocatalysts in comparison with classical semiconductors. Considering the well-established photocatalytic properties of TiO2, it seems logical to focus on titanium in order to design new MOFs for such applications. Nevertheless, because of the difficulty in controlling the reactivity of these ions in solution (especially out of the very acidic conditions), very few crystalline titanium-based MOFs have been described, among the numerous MOFs known in the literature. Thus, obtaining titanium-based MOFs in water and basic medium remains a big challenge. In our work, some strategies has been followed in order to benefice from the advantages of the titanium ions and at the same time confront their limitations by focusing on the exploration of the chemistry of Ti4+ ions (titanium alkoxides, complexes and oxo-clusters) with various polytopic ligands, especially hydroxycarboxylate and polycatecholate derivatives in order to design new stable titanium-based MOFs. Such ligands provide important advantages in comparison with pure carboxylates, such as a potentially higher structural diversity, stronger Ti-O bonds leading to an enhanced chemical stability in basic medium, and a strong absorption in the visible range ensured by ligand to metal charge transfer. On the other hand, the use of titanium molecular complexes or oxo-clusters will be a promising opportunity in order to control the spontaneous hydrolysis and the high activity of Ti4+ ions. By privileging the solvo- and hydrothermal synthesis using the «high-throughput system», these strategies lead to obtain new crystalline solids (molecular and 1D/2D/3D polymeric compounds). The synthesis, the structural characterization by a combination of different technics (X-ray diffraction, TGA analysis, IR spectroscopy, Solid State NMR, sorption measurement…), the study of some properties and the preliminary photocatalytic experiments (water splitting reaction) of these new solids will be discussed in this manuscript
Perrier, Marine. "Elaboration de nanoparticules magnétiques à base de polymères de coordination cyano-ponté pour l'imagerie médicale." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20262/document.
Full textThe goal of the present research is to elaborate new magnetic nanoparticles for medical imaging. This manuscript will describe the nanoparticles' synthesis method, their characterization and their evaluation as contrast agent for magnetic resonance imaging (MRI) and functional probe for scintigraphy.In a first time, we will propose synthesis processes allowing to obtain cyano-bridged coordination polymer based magnetic nanoparticles elaborated from transition metals or lanthanides molecular precursors using cyano-bridged ligands and stabilizing ligands soluble in water and biocompatible. We will introduce the synthesis, structural and textural characterizations and magnetic properties of these nano-objects with general formula My[M'(CN)6]z @stabilizer with M = Fe, Gd, Tb, Y, Ni, Cu ; M' = Fe, Co and stabilizer = PEG NH2, PEG400, Glu-TEG, D-Mannitol, NADG.In a second time, we will evaluate their potential as nanoprobles for application in medical imaging. For that, we will discuss about their capacity to act as a contrast agent for MRI and as a functional probe for scintigraphy or more specifically single photon emission computed tomography (SPECT). We will develop discussion about fundamental parameters which must be optimized to obtain contrast agent nano-objects for MRI and to understand nano-object relaxivity mechanisms. Then, we will test these contrast agents and functional probes in vitro and in vivo on mice. Also, we will evaluate the cytotoxicity, the kinetics and way of elimination, the biodistribution, the genotoxicity and the carcinogenesis of the used nanoparticles
Fan, Xiao. "Heterometallic coordination polymers : toward luminescence modulation." Thesis, Rennes, INSA, 2015. http://www.theses.fr/2015ISAR0007/document.
Full textAccording to the concepts of Green Chemistry, the coordination polymers based on lanthanide ions were prepared by reactions in water between the sodium salts of ligands and lanthanide ions comprised between La and Lu (except Pm) plus Y. Two kinds of samples were prepared : single crystals and microcrystalline powders. The former ones are used to determine the single crystal structure, and the later ones are used to measure the physical-chemical properties : thermal stability, luminescence and magnetism properties. In our work, four ligands were explored: chelidonic acid (H2cda), 5-hydroxy-isophthalic acid (H2hip), 5-nitroisophthalic acid (H2nip) and 4-carboxyphenylboronic acid (Hcpb). As a result, 10 new single crystals were obtained by slow diffusion in U-shape tubes through physical gel (agar) or chemical gels (TMOS or TEOS), by slow diffusion in H-shape tubes through distilled water or by evaporation of the filtrate obtained after the synthesis of the microcrystalline powders. Microcrystalline powders were classified on the basis of their X-ray powder diffraction patterns. Their luminescent properties and magnetic properties were studied in the solid state. Intermetallic energy transfers were also discussed. Especially, for ligands H2hip and H2cpb. Hetero-nuclear compounds (Gd/Tb and Eu/Tb) were also prepared to tune luminescent properties by changing the relative ratios of the lanthanide ions. Lanthanide coordination polymers described in this thesis provide information that could be useful as far as multifunctional materials are targeted
Gomont, Séverine. "Elaboration de polymères hydrocarbonés denses par polymérisation coordinative : mécanismes élémentaires et synthèse macromoléculaire." Bordeaux 1, 2001. http://www.theses.fr/2001BOR12415.
Full textOrtiz, Guillaume. "Synthèse de polymères de coordination poreux pour l'adsorption sélective du dioxyde de carbone." Thesis, Dijon, 2011. http://www.theses.fr/2011DIJOS018.
Full textThe design of material able for CO2 capture is a major issue to achieve post-combustion capture process for many industries. Our work aims to develop new coordination polymer MOF (“Metal-Organic Framework”) prepared by self-assembling polycarboxylic linkers and transition metals. These microporous hybrids materials show important CO2 adsorption properties and are promising in the field of gas separation. The main topic of our work is to synthesise MOFs with high adsorption capacity and selectivity for CO2 over other gases (CO, CH4, N2 and O2). The gas-solid interactions are due to physical phenomena involving the high quadrupolar moment of CO2 and the electrostatic potential lying in the pore of the material. In this manuscript, the synthesis of various organic linkers incorporating N-functionalised polyamines and polyazamacrocycles with benzocarboxylate functions is described. Homo- and hetero- bimetallic materials with original tridimensional structure were obtained from a N-functionalised triazamacrocyclic linker and different metal cations (Zn2+, Co2+, Cd2+ and Ni2+). Studies of porous coordination polymers have shown high CO2 adsorption capacity with a remarkable selectivity in the ambient temperature and pressure conditions
Veselska, Oleksandra. "Études Structurales et Photophysiques de Polymères de Coordination de Thiolates de Métaux Monétaires." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1197/document.
Full textThe coordination polymers (CPs) based on thiolates of coinage metals are well known for their luminescence properties. However, their structures stayed underexplored. In the thesis we present a pioneering study targeting the understanding of the structure formation and the ‘structure-properties’ correlation for neutral homoleptic CPs, [M(SR)]n, M = Cu(I), Ag(I), Au(I). The compounds with thiophenolate derivatives studied in the work, illustrate how the use of some functionalized organic ligands leads to the formation of extended 2D networks or 1D columns by addition of some steric hindrance. The first comparative structural study of amorphous thiolated CPs was performed by PDF analysis. The photophysical studies showed the diversity of luminescent properties of the CPs based on thiolates of coinage metals. Double or multiple emission peaks, high quantum yield of orange-toinfrared emitters, significant lifetime variation with temperature… all of these intrinsic properties reveal the high potential of these compounds for diverse optical applications
Boudjema, Lotfi. "Etude des propriétés d'adsorption d'hydrocarbures par des polymères de coordination en milieu humide." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2018. http://www.theses.fr/2018ENCM0017/document.
Full textThis PhD thesis is focused on the study of wet adsorption and separation properties by porous coordination polymers. We used adsorption volumetry, gas chromatography separation techniques, fluorescence spectroscopy techniques and Monte Carlo modeling to understand the mechanisms governing the adsorption of these materials. The adsorbable molecules studied are water and hydrocarbon vapors linear (pentane and n-hexane), cyclic (cyclohexane and cyclohexene) and polycyclic (anthracene). The adsorbents studied are the Prussian Blue Analogues (ABP) as well as two reference porous organometallic materials, ZIF8 and CuBTC. Among the main results provided by this work, we have shown that Prussian Blue Analogues have remarkable hydrothermal stability conferring them very promising wet adsorption properties. Among the ABPs studied, Co [CoIII (CN)6] 0.66 ⊡0.33 .5.2H2O showed adsorption and separation properties far superior to those of other ABPs. For example, it has been possible to modulate its hydrophobic / hydrophilic balance by controlling the coordination of water on the unsaturated metal center, while preserving its lipophilic character. We have also shown that this Prussian blue analogue is capable of separating mixtures of dry or very wet hydrocarbons repeatedly. On a more fundamental aspect, we have shown that the confinement of anthracene by ZIF-8, which is a porous organometallic compound with cavities of size adjusted to that of the fluorophore, could induce a complete extinction of certain absorption bands of this one
Agbossou-Niedercorn, Francine. "Métalloporphyrines supportées sur polymères, vers l'élaboration d'un modèle biomimétique du Cytochrome P 450." Lyon 1, 1985. http://www.theses.fr/1985LYO19041.
Full textSamar, Dalila. "Oligomères et polymères organométalliques et de coordination construits à partir de diphosphines et d'isocyanures." Mémoire, Université de Sherbrooke, 2006. http://savoirs.usherbrooke.ca/handle/11143/4701.
Full textMaksoud, Mahmoud. "Mise en forme de polymères de coordination microporeux dans les canaux de membranes d'alumine." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/3080/.
Full textThe research project developed during this thesis aimed at the construction of microPorous Coordination Polymers (PCP, pore diameter < 2 nm) inside the cylindrical channels of membranes; (Anodisc 13, macroporous alumina membranes, pore diameter ˜ 250 nm, thickness 0. 6 µm). A simple and efficient experimental procedure has been developed to this end. It involves the filtration of reagent solutions through the membrane channels, therefore allowing a step-by-step PCP formation. This approach allows obtaining efficiently a homogeneous distribution of PCP crystals inside the channels. This synthesis method is versatile. The use of nanoparticles suspension of one of the reagents or PCP nanoparticles instead of a solution can substantially increase the efficiency of this method, by decreasing the cycle's number and increasing the amount of reagent retained by the membrane during each cycle. This method can be adjusted according to the specificities and the characteristics of the targeted PCP. Both the metal ion, the ligand used and the PCP influence the location, the crystal growth and the crystallinity of the formed PCP. Resulting composites could be envisaged for application domains such as separation, heterogeneous catalysis and sensors
Haquin, Victor. "Polymères de coordination à base de terres rares utilisables comme marqueurs anti-contre-façon." Rennes, INSA, 2011. http://www.theses.fr/2011ISARA025.
Full textCoordination polymers based on lanthanides usable like phosphors in the field of the counterfeit seem offer new opportunities. The aim of this work was to show the possibility to sign the colour of the luminescence with the colorimetric coordinates. Inversely, if we know these coordinates, could we find the chemical formula of the compound ? In order to investigate these possibilities, we have especially studied the compounds based on the benzene-1,4-dicarboxylate ligand and the lanthanides. The drawn up synthesis route in water is effortless and offers the possibility to synthesize around one million of heteropolynuclear compounds. We are actually able to sign the colour of the luminescence of the compounds according to the calculations of the International Commission on Illumination. But we have shown several limits for the calculations. Especially, we are not able to calculate the colour of the compounds from a theoretically approach
Taupier, Gregory. "Microscopie par génération de somme de fréquences optiques : application aux polymères de coordination chiraux." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAE027/document.
Full textWe have built a set-up to perform sum frequency generation (SFG) microscopy in order to study isotropic chiral media. This set-up was first validated with molecules of bi-2-naphthol in liquid solution and sol-gel matrices. We have established the experimental conditions to limit the bleaching phenomena of the chromophore by two-photon absorption. Next, we have conducted a study of chiral coordination polymers produced through the self-assembly of chiral organic ligands and metal ions in solutions. We have measured a chiral SFG signal developing while films of chiral coordination polymers and complexes are drying. Thus we show that SFG microscopy specific to isotropic chiral media makes it possible to detect the coordination process of chiral coordination polymers in the condensed phase and monitor the establishment of the solid phase
Boyer, Karine. "Synthèse de monomères et polymères contenant du silicium tetra- ou hexa-coordonné." Montpellier 2, 1996. http://www.theses.fr/1996MON20090.
Full textDemars, Thomas. "Synthèse et caractérisation de polymères de coordination de métaux du groupe f : conversion en matériaux inorganiques." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2012. http://www.theses.fr/2012ENCM0010/document.
Full textCoordination polymers (CP) are of great academic and industrial interest due to flexible structure and composition and offer prospects for original chemical (catalysis, soft-hard materials conversion…) and physical properties (magnetism, optics…). The major interest of these studies is to check the transfer of the structure, meso-structure and composition from the CP to the ceramic via a thermal treatment. In this context, this thesis describes studies on conversion of coordination polymers obtained by self-assembly of 4f and 5f metal ions with 2,5-dihydroxy-1,4-benzoquinone (DHBQ). Aqueous and anhydrous synthetic ways were developed, which yielded different kinds of CPs (4f, 4f-4f, 4f-5f) ; solid solutions were obtained with the mixed compounds. The products were characterized and their behaviour under thermal treatment was studied. The main results show that the DHBQ-based precursors obtained by aqueous way have a micrometric meso-structure, formed by the assembly of micro-crystalline subunits which all posses the same crystallographic structure. The study of the assembly of the meso-structure allowed controlling the morphology of the elementary grain (cylinder, cube, disk ...) with very good size distribution. The implementation of anhydrous systems in a controlled atmosphere allowed yielded a wider range of micro-structural parameters (surface area, porosity ...). For all CP-type compounds, the thermal conversion to ceramic has barely altered the morphology of the materials. The microstructural aspects could be controlled via the method of synthesis
Agulhon, Pierre. "De la complexation des cations aux matériaux d'intérêt : les gels ionotropiques d'alginate." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2012. http://www.theses.fr/2012ENCM0004.
Full textAlginates, polysaccharides produced by brown algae, are linear block-copolymers formed by mannuronate (M) and guluronate (G) units. Their structure depends on the natural source. The coordination of divalent or trivalent cations (except Mg2+) with the carboxylate functions leads to the formation of a hydrogel. In order to get some insight in ionotropic alginate gel formation, hydrogels and supercritical dried aerogels were analysed through various characterizations at different scales. The ab initio molecular orbital analysis on small complexes revealed strong coordination-covalent bonds in the transition metal complexes, whereas only ionic interaction occurs between the alkaline-earth cations and the carboxylates. Depending on the M/G ratio and the nature of the cation, different structural regimes were identified by SAXS analysis (~10-200Å) : well-defined fibrillar gels or gels with multiple junction nature. The mechanical properties of the hydrogels and surface areas of the resulting aerogels are directly related to these morphologies. The concomitant presence of different metals in the gel can bring cooperative effect for the formation but also for the properties of the materials. New methods to control the synthesis of hetero-cationic gels were implemented, taking into account the affinity effects. On the basis of this study, we developed new nanostructured functional materials synthesis. Some were built directly in the alginate network using the gelling cations. Others needed to sacrifice the matrix to form nanocrystalline single or mixed oxides
Abdallah, Ahmad. "Etude des mécanismes à l’origine de la luminescence dans les polymères de coordination hétéro-lanthanides." Thesis, Rennes, INSA, 2019. http://www.theses.fr/2019ISAR0005.
Full textThe aim of this thesis was to study the luminescence mechanisms of lanthanide ions in coordination polymers. Series of molecular alloys (hetero-lanthanide compounds in which lanthanide ions are randomly distributed) based on 4-carboxyphenylboronic acid were synthesized, by varying the relative contents of the lanthanide ions. The synthesized products have been studied from the perspective of their application in the fields of anti-counterfeiting and molecular thermometers. On the other hand, new systems using other boronic acid derivatives have been synthesized. A new crystal structure was obtained based on 2-carboxyphenylboronic acid. The second part of this thesis focused on the synthesis and characterization of core-shell microcrystalline powders. This is the first time that micro-structuration of a coordination polymer is achieved at the micrometric scale. The synthesized powders were characterized by scanning electron microscopy, transmission electron microscopy and EDS analyses. Their optical properties have been compared with those of the corresponding molecular alloys. The obtained results highlighted the interest of the micro-structuration concerning intermetallic energy transfers. This strategy of synthesis based on epitaxial growth, is possible because of lanthanide similar chemical properties. This work demonstrates that in the case where the thermodynamic and\or kinetic constants allow it, the shell crystallizes according to the same crystal structure than the core even if its crystal structure is different when it is synthesized alone
Yquel, Morgane. "Polymères de coordination à base de pyrazine : vers l'obtention de phases magnétiquement ordonnées à haute température." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0110.
Full textThis thesis is devoted to the synthesis of two-dimensional (2D) and three-dimensional (3D) pyrazine-based magnetic coordination polymers with 3d metal cations. Such compounds are often paramagnetic or magnetically ordered at low temperature (below 77 K, the temperature of liquid nitrogen). In order to achieve magnetic ordering at high temperature (> 77 K), the redox-active bridging ligand pyrazine has been used. In the first chapter, fundamentals of magnetism useful for the reading of the thesis are introduced. After that, a bibliographic study about magnetic coordination polymers with high critical temperature, creation of organic radicals by post-synthetic reductions, properties of multifunctional porous magnetic materials, and 3D coordination polymers known as SIFSIXs is proposed. Chapters II and III are devoted to post-synthetic reduction of the 2D compounds Co(pyz)2Cl2 and Fe(pyz)2Cl2, leading to radical pyrazine and high temperature magnetic ordering. In chapter IV, three new 3D networks are described, among two showing antiferromagnetic phases at low temperature. Post-synthetic reduction has been tried on one of those to try to increase the critical temperature in which the compound is magnetically ordered
Bartual-Murgui, Carlos. "Polymères de coordination à transition de spin : synthèse, élaboration de couches minces, nanostructuration et propriétés physiques." Phd thesis, Université Paul Sabatier - Toulouse III, 2010. http://tel.archives-ouvertes.fr/tel-00652851.
Full textBartual, Murgui Carlos. "Polymères de coordination à transition de spin : synthèse, élaboration de couches minces, nanostructuration et propriétés physiques." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1157/.
Full textIn the last few years, the technological demand concerning information storage capacity has grown considerably and is, mostly, due to the development of nano-science and nano-technology: the aim is storing a large quantity of information in an increasingly reduced space. Moreover, miniaturization of other electronic or photonic devices such as gas sensors represents an expanding field. Organic and inorganic molecular compounds are highly promising for these applications. Particularly, bistable materials, which present a hysteresis loop in some of their physical properties are good candidates in the design of information storage and gas sensor devices on a very small scale. Nevertheless, deposition of thin films or the fabrication of nano-objects, as well as their implementation without modifying their properties represents an important step in the design of any device. In this context, this thesis presents the design, synthesis and characterization of a new family of coordination polymers presenting bistable properties. These materials are spin crossover Hofmann-like tridimensional networks. The physical and chemical studies carried out on these compounds are primarily focused on the changes to the spin crossover properties as a function of the chemical composition, which can be altered according to the synthetic methods. Furthermore, the influence of adsorbed guest molecules on the structural and physical properties of these compounds has been investigated. This manuscript contains an original method to the elaboration of thin films of such materials, the so-called “layer by layer” or “multilayer self-assembling” technique. Additionally, micro and nano-structures of these films have been prepared combining lithographic techniques and sequential assembling. The modification of experimental conditions for the layer by layer deposition has allowed control over growth and the surface quality thin films (roughness of a few Angström) to be realized. Thin films and nano-objects have been characterized by different optical (Raman microscopy, optical ellipsometry, surface plasmon spectroscopy…) and surface analysis (AFM, dark field microscopy) techniques
Mimassi, Lamia. "Auto-assemblage raisonné de métallo-macrocycles et de polymères de coordination : chiralité, reconnaissance et encapsulation d'ions." Paris 6, 2005. http://www.theses.fr/2005PA066157.
Full textKoepf, Matthieu. "Agrégats multi-porphyriniques pour la conduite photonique." Université Louis Pasteur (Strasbourg) (1971-2008), 2007. http://www.theses.fr/2007STR13030.
Full textBissessar, Damien. "Synthèse de nouveaux composés phosphorés : vers de nouveaux additifs pour polymères et des complexes cuivreux luminescents innovants." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAE029.
Full textThis thesis work was part of a project in collaboration with a chemical industry. The topic is the development of new antioxidant molecules to protect plastic materials. Initially, the strategy envisaged was based on the synthesis of phosphines by hydrophosphination, reaction in accordance with the green chemistry principles. The reaction is highly regioselective and the simplicity of the synthesis allowed us to obtain many new phosphines which were then tested for their antioxidant properties. We were able to identify several original structures that meet the requirements. In a second step, we studied the feasibility of developing new secondary antioxidant additives based on phenolic derivatives, including cardanol, which is a biosourced molecule. Many new phosphorus molecules have been synthesized, completely characterized and evaluated for their antioxidant properties. Finally, we tried to apply our new compounds for other applications. Since phosphines are excellent ligands for transition metals, we studied coordination chemistry with copper (I), hoping to form luminescent copper complexes. Indeed, the development of stable light-emitting diodes remains a technological challenge despite all the current advances. In this context, many new cubane-type complexes have been synthesized and fully characterized. These tetranuclear complexes are interesting structures, easy to synthesize, with excellent quantum yields. These complexes exhibit high stability and luminescence properties, which make them very good candidates for optoelectronic devices
Guy, Daniel. "Synthèse de monomères et polymères contenant des atomes de phosphore ou de silicium hypercoordonnés." Montpellier 2, 1997. http://www.theses.fr/1997MON20151.
Full textGasnier, Aurélien. "Le cyclame, une plateforme modulaire pour conception de polymères de coordination : de la molécule "switch" au matériau moléculaire dynamique." Phd thesis, Université Joseph Fourier (Grenoble), 2008. http://tel.archives-ouvertes.fr/tel-00366049.
Full textGrosshans, Philippe. "Tectonique moléculaire : Correlation entre flexibilité des tectons et topologie des réseaux." Strasbourg 1, 2005. https://publication-theses.unistra.fr/public/theses_doctorat/2005/GROSSHANS_Philippe_2005.pdf.
Full textLavenn, Christophe. "Les thiolates d'or : des polymères de coordination [Au(SR)]n luminescents aux clusters [Aun(SR)m] pour la catalyse hétérogène." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10256.
Full textSmall gold nanoparticles (< 5 nm) are materials presenting a good catalytic activity in oxidations reactions, especially under soft conditions of temperature and pressure. However, it can be difficult to obtain monodisperse particles with a diameter less than 5 nm. In this sense, gold clusters are interesting, because they are atomically defined compounds, presenting a proper formulation. This means that the number of gold atoms and of stabilizers in the clusters are defined and, as they can be isolated pure, they constitue a novel class of perfectly monodisperse nanomaterials. Therefore, we are interested, in this thesis, in the synthesis and assembly of gold clusters. Indeed, gold nanoparticles are usually deposited on a support, resulting in the loss of accessible area. We therefore wanted to use gold clusters as (i) molecular species deposited on a support and (ii) as building blocks to assemble and organize tridimensional networks where the porosity permits the substrates/products diffusions and avoid the support effects. Our study deals with the synthesis of gold clusters, and we are also interested in the gold (I) coordination polymers, which are important reaction intermediates formed during the clusters synthesis and to its photophysical properties. In order to have clusters presenting external functions enabling their assembly or deposition on a support, we developed a novel synthesis suitable for para-substituted thiophenolates. We managed to isolate new clusters stabilized by heterotopic ligands such as [Au25(SPh-pNH2)17]. Those compounds have been deposited on a mesoporous support and used as oxidative catalysts. Our results show that gold clusters are molecular precursors that permit to prepare effective catalysts with narrow particle size (1-2 nm) and presenting high catalytic activity compared to the one exhibited by reference materials
Martin, Nicolas. "Synthèse et étude cristallochimique de carboxylates d'actinides tétravalents (Th, U, Np) : polymères de coordination et entités moléculaires à haute nucléarité." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10164/document.
Full textUnderstanding the behavior of actinides in the environment is an important and very complex issue due to phenomena involved in chemical processes. Among them, one can mention the complexation, via carboxylate functions from the humic substances present in the soils. In an aqueous medium, actinides at the oxidation state IV are very sensitive to the hydrolysis process impacting their mobility. This thesis focuses the reactivity of these actinides (IV) (Th, U and Np) in the presence of organic ligands with aromatic carboxylate functions, in order to improve our knowledge about entities formed and linked to such organic linkers.More than forty new compounds based on actinides (IV) and polycarboxylic acids have been synthesized. Their crystallographic structures were determined by single crystal XRD and their descriptions are reported. The control of the hydrolysis of these metals within our compounds has been managed by varying the acidity in aqueous medium or by addition of controlled amount of water in organic solvents. Some of the compounds presented are built from polynuclear moieties having from 2 to 38 metal centers. For the latter ({U38} and {Np38}), a new synthetic pathway was investigated. During the study of these different compounds, we have demonstrated the analogies or the differences existing between these actinides, and have improved our knowledge on the crystallochemistry of neptunium (IV). Finally, we proved the ability of N- and O-donor ligands to simultaneously complex the uranium (IV) with other di- (Mn) or trivalent (Ln) metals
Imaz, Inhar. "Sur la mise en œuvre de composés de coordination tétraédriques pour l'élaboration d'architectures supramoléculaires nanoporeuses : synthèse, caractérisation et propriétés zéolitiques d'édifices hétérométalliques ou hybrides." Bordeaux 1, 2005. http://www.theses.fr/2005BOR12956.
Full textGuichaoua, Dominique. "Modulation des propriétés optiques non linéaires de polymères photoactifs conjugués et de complexes de coordination à base de ligand « iminopyridine azobenzène »." Thesis, Angers, 2018. http://www.theses.fr/2018ANGE0008/document.
Full textThe nonlinear optical (NLO) performance of conjugated azo-based iminopyridine complexes with zinc, silver and rhenium metal cations as well as styrylquinoline containing methacrylic polymers are studied by the proven methods of Maker fringe and Z-scan. The NLO refractive index, NLO absorption coefficient, second order hyperpolarizability and NLO absorption cross section for the azo-based iminopyridine zinc(II) and silver(I) complexes were obtained and analysed. The enhanced NLO parameters of the Rhenium(I) containing azo-based iminopyridine complexes as compared to their corresponding ligands confirm the positive role of the metal complexation. This study promotes the better understanding of the structure-property relationship with possible prediction of NLO properties in such metal complexes. The results of the NLO investigation (second and third harmonic generation) of high-quality thin films of styrylquinoline containing methacrylic polymers are presented. Strong dependence of the NLO response upon the structure of the polymers has been found, which is related to a different charge transfer occurring within the styrylquinoline fragments. Good compatibility has been achieved between the theoretical and experimental results. The contrast in NLO response observed after their trans-cis photoisomerization makes them valuable components for photonics devices
David, Jérémy. "Étude des mécanismes de réduction carbothermique d'oxydes métalliques du groupe IV par MET : Apport de précurseurs de type polymères de coordination." Limoges, 2013. https://aurore.unilim.fr/theses/nxfile/default/f239d478-5a37-46db-8ffc-dda194277ff8/blobholder:0/2013LIMO4013.pdf.
Full textThis thesis is dedicated to the study of the reactional mechanisms involved in the formation of oxycarbides by different synthesis routes. It reconsiders the literature that used to deal with thermochemical and kinetical approaches. This original work deals with a structural and chemical study mainly led by transmission electron microscopy (TEM) and X-ray diffraction (XRD) on samples obtained at different advancement rates. The first part of this study is about the classical carbothermal reduction transformations of dioxides (TiO2, ZrO2, HfO2) reducted by carbon black into oxycarbide. We highlight that the reactional mechanisms involved into the parent phases destabilization are intrinsically linked to the dioxides structure and that the initial size of oxide particles has no influence on the ones of the oxycarbides. The nucleation site of the oxycarbide and the growth mechanisms have also been highlighted and discussed. A second part of the manuscript is dedicated to an original study aiming to synthesize carbide from Metal-Organic Frameworks (MOF). The progressive transformation of the precursors into oxycarbides is very likely to the ones highlighted in the field of classical carbothermal reactions
Najah, Aymane. "Étude de la fonctionnalisation des polymères de coordination poreux (MOF) par procédé plasma de type décharge à barrière diélectrique impulsionnelle (IDBD)." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0041.
Full textPorous coordination polymers, more commonly known as MOFs "Metal-Organic Frameworks", are an emerging class of porous materials formed by the assembly of metal ions and organic ligands. Due to their structures and properties, MOFs have attracted great interest for a wide range of applications, mainly in gas storage and separation, catalysis, optics, energy storage…. One of the main advantages of these materials lies in the possibility of modulating or even enhancing their properties through functionalization. The functionalization of these materials is mostly carried out by wet chemical process that often presents some constraints like the duration of the reactions, the energy cost…. The work presented in this thesis concerns the study of the functionalization of these materials by a dry chemical method, in this case by a plasma treatment using an impulse dielectric barrier discharge (I-DBD). To the best of our knowledge, no method of functionalization of MOFs by plasma has yet been reported in the literature. The main objective of this thesis is to study the functionalization of these materials by DBD by grafting amino groups. A parametric study of the DBD discharge conditions made it possible to determine the most favorable DBD discharge parameters/conditions to produce nitrogen radicals in the plasma. Thus, this production is favored using an NH3 plasma compared to N2/H2 or Ar/N2/H2 plasmas. In addition, the discharge conditions optimized for carrying out DBD treatment in pulsed regime in NH3 are as follow: a voltage of 6 kVp-p, a frequency of 4 kHz, an inter-electrode distance of 3 mm and a pressure of 104 Pa. A first study of pre-functionalization of terephthalic acid showed the effectiveness of the DBD process in grafting amine groups onto the organic ligand. This work continued with the in-depth study of the DBD plasma treatment of two MOFs: zinc-based MOF-5 and aluminum-based MIL-53. These investigations have highlighted the ins tability of MOF-5 with respect to ammonia, thus highlighting the importance of working with trivalent or even tetravalent cations to carry out plasma treatments in NH3. The DBD treatment of MIL-53 Al has proven successful functionalization via insertion by substituting a carbon atom with a nitrogen one within the organic ligand, which opens the possibility of using this pathway to functionalize other MOFs. Finally, the analysis of the textural and hydrogen adsorption properties at room temperature and atmospheric pressure showed an improvement of the amount of hydrogen stored in the MIL-53 Al treated with DBD. Although this amount remains low, these results are promising to develop materials with a higher adsorption capacity at room temperature, or even at atmospheric pressure
Juvenal, Frank. "Polymères de coordination luminescents 1D et 2D avec des ligands rigides contenant du Pt(II) montrants des propriétés d’adsorption du CO2." Mémoire, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/10578.
Full textAbstract: The design of new functional materials has a long history. For the past two decades, the field of organic and inorganic polymers has attracted attention of researchers. More importantly, porous materials such as Metal Organic Frameworks (MOFs), Covalent Organic Frameworks (COFs) as well as porous coordination polymers are now being intensively studied due to their potential applications including gas storage, gas separations, catalyst and sensing. On another hand, Pt-containing polymers have shown potential applications in solar cells and light emitting diodes. The masters’ thesis is mainly divided into three main sections presenting new results. In the first section; Chapter 2 mainly discusses the formation of coordination polymers with CuX salts (X= Cl, Br, I) and trans-[p-MeSC6H4C≡C-Pt(PMe3)2-C≡CC6H4SMe] (L1), in either PrCN or PhCN. The resulting polymers obtained were 2D (bidimensional) CPs or 1D (unidimensional) CPs in all cases. However, 2D CPs obtained when CuBr salt is used by either using PrCN or PhCN did not incorporate the solvents in their cavities. On the other hand, the 2D CP and the rest of 1D CPs obtained had either the crystallization molecules in the cavities or coordinated to the copper cluster. The copper-halide clusters were either the rhomboids Cu2X2 fragments or the step cubane Cu4I4. The photophysical measurements in the presence and absence of solvent crystallization molecules were performed. In addition, the porosity of the CPs was evaluated by adsorption isotherms. The vapochromism of the solvent-free 2D and 1D CPs were investigated as well as CO2 sorption measurements were perfomed. Furthermore, we then attempted to use CuCN and L1 in MeCN which is reported in the second section as Chapter 3. The obtained CP was unexpected as L1 broke and a cyanide (CN‾) ion coordinated to the Pt atom leading to the formation of zigzag 1D CP. The coordination bonds Cu-S or/and Cu([eta]2-C≡C) were generally observed with L1, but not in the CuCN case. Instead a 1D chain of (CuCN)n was made and the broken L1 now binds the chain via a Cu-N bond. The photophysical and thermal stability properties were studied. Lastly, the third section, Chapter 4 deals with a potential predictability of CP formation by using CuX salts (X= Cl, Br, I) and either trans-[p-MeSC6H4C≡C-Pt(PMe3)2-C≡CC6H4SMe] (L1) or trans-[p-MeSC6H4C≡C-Pt(PEt3)2-C≡CC6H4SMe] (L2) in MeCN as the solvent. The use of L1 resulted in either 2D or 1D CPs with the MeCN trapped inside of the cavities while L2 resulted in 1D CPs without MeCN being present in their cavities. The thermogravimetric, photophysical as well as gas sorption measurements (only for those with crystalisation molecules) were perfomed.
Maurin-Pasturel, Guillaume. "Synthesis and study of molecular-based multifonctionnal nano-objects : towards biomedical applications." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS093/document.
Full textOne of the most studied fields of modern material chemistry concerns the elaboration of functional nanomaterials reserved for a wide range of applications. For several years, researchers have been particularly attracted by the design of multifunctional systems combining in a single system the properties of different materials and exhibiting diverse physical responses when subjected to various stimuli. This work describes the combination of both optical properties of gold and magnetic properties of coordination polymers such as Prussian Blue analogous to form magneto-optical nano-heterostructures presenting an intricate core-shell architecture.Firstly, we have synthesized a series of Prussian Blue Analogous nanoparticles such as Ni3[Fe(CN)6]2 presenting different and controlled sizes, in order to better understand the evolution of their characteristics upon the size reduction from the micro- to the nanoscale.Secondly, we focalized on the design of heterostructured nano-objects composed by a gold core coated with a uniform K+/Ni2+/[FeII(CN)6]4- Prussian Blue analogous shell based on a new and rational approach. These core-shell Au@K+/Ni2+/[FeII(CN)6]4- nanoparticles exhibit both optical properties of the gold core and paramagnetic properties originating from the cyano-bridged coordination polymer layer. Using several techniques, we have investigated the growing mechanism of such intricate system. The optical responses of these nanoparticles can be modulated by controlling the gold core size and the Prussian Blue analogous shell thickness by modifying the experimental parameters. Then we extended the used synthetic approach to other gold core containing heterostructures with K+/Co2+/[FeII(CN)6]4- shell. We have also investigated an original way to design hollow nanoparticles by etching the gold core.The implement of different magnetic behavior, such as ferromagnetism or superparamagnetism, can be achieved by the subsequent growing of a new Prussian Blue Analogous shell on the Au@K+/Ni2+/[FeII(CN)6]4- nanoparticles. In this aim, several Prussian Blue analogous were selected to form the second layer. These double-layered nanoparticles exhibit optical properties originating from the gold core. Additionally, ferromagnetic properties have been successively implemented, proving the multifonctionality of these nano-objects. Particularly, a study on the evolution of the magnetic properties according to the shell thickness of the Prussian Blue analogous was performed on a series of different–sized Au@K+/Ni2+/[FeII(CN)6]4-@K+/Ni2+/[CrIII(CN)6]3- nanoparticles in order to demonstrate the influence of the core-shell architecture on the nature of the magnetic properties.Finally, we evaluated the potential of these nanoparticles for the medical imaging by scintigraphy. Simple Prussian Blue and core-shell Au@K+/Ni2+/[FeII(CN)6]4-@K+/Fe3+/[FeII(CN)6]3- nanoparticles were synthesized and post-synthetically grafted by organic molecules (commercial dextran, biopolymers or lipidic bilayer) to ensure their dispersibility in aqueous media. These nanoparticles have been loaded by radioactive 201Tl+ ions in order to investigate their behavior in the living organism by using SPECT-CT tomography in vivo and establish the influence of the nanoparticles composition, the morphology and the functionalization on the nanoparticles biodistribution and kinetic
Genre, Caroline. "Synthèse et caractérisation de nouveaux polymères du fer(II) à transition de spin." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2007. http://tel.archives-ouvertes.fr/tel-00284279.
Full textMoreau, Florian. "Cristallochimie de nouveaux polymères de coordination à noyau spirobifluorène ou tétraphénylméthane : du design du ligand à la topologie et aux propriétés du solide hybride." Rennes 1, 2011. http://www.theses.fr/2011REN1S168.
Full textThis work deals with crystallochemistry of new coordination polymers. In order to control the network topology and to obtain porous coordination polymers, we proposed the design of tetracarboxylate ligands bearing two kinds of cores with fixed geometries: the tetraphenylmethane core with a Td symmetry and the spirobifluorene core with a D2d simmetry. Phenyl spacers were introduced in a scale chemistry strategy and the position of the coordinating function on spacer was change to allow ligand flexibility. These ligands were reacted with zinc, copper and lanthanum salts. The structures of the coordination polymers were solved by single crystal X ray diffraction. The thermal and chemical reactivities as well as the luminescence and gas sorption properties were investigated. The first chapter is devoted to the bibliographic study of porous coordination polymers. The second chapter exposes the ligands synthesis strategy. The next three chapters group the coordination polymers according to their structural features. Much interest is given to the topologies, the interpenetration of the frameworks and the influence of the flexibility of the ligands. The last chapter is devoted to 2D coordination polymers with spirobifluoren core. A summary of the main features of the synthesized materials closes this dissertation while tackling the perspectives this work offers
Farran, Rajaa. "Transfert d'électron photoinduit au sein d'assemblages hétérométalliques associant le [Ru(bpy)3]2+ à des complexes bisterpyridine du Fe(II), Co(III) et Cr(III)." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAS009/document.
Full textThis thesis deals with the synthesis and characterization of inorganic triads for photoinduced charge separation. A range of photosensitizers will be studied, and the effect of the donor and acceptor will be assesed as well. These systems will be studied in solution and immobalized on surfaces. Cette thèse traite de la synthèse et la caractérisation des triades inorganiques pour la séparation de charge photoinduite. Une gamme de photosensibilisateurs seront étudiées, et l'effet du donneur et accepteur sera ainsi étudié. Ces systèmes seront étudiés en solution et immobalizes sur les surfaces
Howe, Andrew. "Immobilisation of Ru-Based Molecular Catalysts for Electrochemical Water Oxidation." Electronic Thesis or Diss., Pau, 2022. https://tel.archives-ouvertes.fr/tel-04121215.
Full textArtificial photosynthesis requires catalysts for efficient and selective conversions of small molecules. Molecular catalysts are advantageous to use in these instances as they offer precise control over chemical reactivity. They are synthetically tunable, and their catalytic mechanisms are often well documented and more readily understood than those of solid-state catalysts. In this thesis, the synthetic incorporation of molecular catalysts into heterogenised molecular anodes for water oxidation are evaluated. The catalysts are incorporated as structural linkers into porous metal-organic framework (MOF) structures, and as coordination oligomers stacked onto graphitic surfaces.The preparation of MOF/molecular catalyst hybrid materials of two topologies, UiO (UiO = Universitet i Oslo) and NU-1000 (NU = Northwestern University), were investigated. Multiple synthetic methods for the incorporation of molecular ruthenium-based catalysts into MOFs were examined in papers I and II. In paper III of this thesis, a Ru-bda type molecular complex was successfully used in the solvothermal synthesis of a new MOF. The resulting material is the first of its kind that is built exclusively from molecular water oxidation catalyst linkers. It is shown that MOF incorporation greatly enhances the structural stability of the catalyst linker in chemical water oxidation experiments, giving rise to higher turnover numbers compared to that of a homogenous reference system. Finally, paper IV describes a stable and inert molecular ruthenium complex, which possesses a flexible adaptative multidentate equatorial (FAME) type equatorial ligand with a carbanion on the equatorial ligand that forms a C-Ru bond. This molecular complex is studied in homogeneous phase, and subsequently incorporated into a coordination oligomer, which can be activated for water oxidation catalysis. This finding broadens the field of molecular catalysis significantly, and proves that supramolecular interactions can be used to promote electrocatalysis in complexes which are otherwise too inert and stable to engage in electrocatalytic reactions
Brissard, Muriel. "Synthèse énantiosélective de réseaux bimétalliques optiquement actifs : relation entre propriétés optiques et magnétisme." Paris 6, 2002. http://www.theses.fr/2002PA066055.
Full textDeiters, Emmanuel. "Tectonique moléculaire : Réseaux moléculaires à base de porphyrines." Strasbourg 1, 2006. http://www.theses.fr/2006STR13095.
Full textA first part of this Ph. D report reminds briefly the general properties of the porphyrin macrocycle. A second part is dedicated to the conception of a photoactiv lanthanide-chromophore device which is able to lead to a laser emission. The two other parts are devoted to the building of finite (metallamacrocycles [2+2]) or infinite (coordination polymers) self assembly architectures starting from meso-tetraarylporphyrins bearing coordinating groups such as pyridyl or pyridine-N-oxide. Among the numerous results obtained, two tridimensional networks have allowed to perform reversible single-crystal-to-single-crystal solvent exchanges
Robin, Julien. "Cristallochimie de nouveaux polymères de coordination chiraux poreux à corps central fluorène pour la séparation et la catalyse énantiosélective : synthèses, structures cristallines et réactivité." Thesis, Rennes 1, 2013. http://www.theses.fr/2013REN1S164/document.
Full textThis work deals with crystallochemistry of new porous coordination polymers or Metal-Organic Frameworks (MOFs) for enantioselective separation and catalysis. Chiral molecules are of a key role in molecular recognition as a consequence the ability to synthesize only one enantiomer or to separate a mixture is priority for chemistry. The particularity of coordination polymers to possess an organic part gives the possibility to introduce chiral fragments in the material structure. We decided to introduce chirality on MOFs by using originals chiral carboxylates ligands with fluorene core. The first chapter is devoted to the bibliographic study of porous coordination polymers. The second chapter describes the ligands synthesis strategy and characterizations. The next three chapters group the crystal structures and physicochemical characterizations of coordination polymers according to the metal used for their preparation (Zn, Cd et Cu). These three chapters explore also the general issues related to MOFs as the loss of porosity consequent to frameworks interpenetration, and strategies implemented to circumvent, such as increasing the size and functionality of the ligands used. Finally the thermal and chemical reactivity of MOFS has been investigated by powder X rays diffraction in order to understand reactions mechanisms and eventually the creation of acid sites for catalytic applications. The experimental technics are detailed in the last chapter. Finally a summary of this work closes this thesis showing the future perspectives of this work
Falaise, Clément. "Polymères de coordination : utilisation de matrices poreuses de type MOF pour la capture des radionucléides et cristallochimie des carboxylates d'actinides légers (Th, U) tétravalents." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10115/document.
Full textThe use of nuclear energy obviously raises the question of the presence of radionuclides in the environment. Currently, their mitigation is a major issue associated with nuclear chemistry. This thesis focuses on both the trapping of radionuclides by porous solids called Metal-Organic Frameworks (MOF) and the crystal chemistry of the carboxylate of tetravalent actinides (AnIV). The academic knowledge of the reactivity of carboxylate of AnIV could help the understanding of actinides speciation in environment. We focused on the sequestration of iodine by aluminum based MOF. The functionalization (electron-donor group) of the MOF drastically enhances the iodine capture capacity. The removal of light actinides (Th and U) from aqueous solution was also investigated as well as the stability of (Al)-MOF under γ radiation. More than twenty coordination polymers based on tetravalent actinides have been synthesized and characterized by single crystal X-ray diffraction. The use of controlled hydrolysis promotes the formation of coordination polymers exhibiting polynuclear cluster ([U4], [Th6], [U6] and [U38]). In order to understand the formation of the largest cluster, the ex-situ study of the solvothermale synthesis of compound {U38} has also been investigated