Dissertations / Theses on the topic 'Porphyrin'
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Luo, Jin-Li. "Porphyrin metabolism in porphyria cutanea tarda." Thesis, Open University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315308.
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Guo, Rong. "Porphyrin metabolism in congenital erythropoietic porphyria." Thesis, Open University, 1992. http://oro.open.ac.uk/57392/.
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Meso-hydroxyuroporphyrin I, B-hydroxypropionic acid uroporphyrin I, hydroxyacetic acid uroporphyrin I and peroxyacetic acid uroporphyrin I have been isolated from the urine and plasma of patients with congenital erythropoietic porphyria (CEP) by high-performance liquid chromatography and characterized by liquid secondary ion mass spectrometry and chemical properties. The physico-chemical properties of these compounds have been studied. The hydroxy- and peroxyacetic acid- uroporphyrin I derivatives are the true metabolites of uroporphyrinogen I in vivo and their presence in urine and plasma is a common feature of CEP. The absence of these derivatives in duodenal aspirate and faeces suggests that they are of erythropoietic origin. The mechanism of formation of the hydroxy- and peroxyacetic acid- uroporphyrin I has been investigated. Peroxyacetic acid uroporphyrin I is formed from uroporphyrinogen I in the presence of H202 and iron while the hydroxylated uroporphyrin I derivatives are most probably produced by hydroxyl radicals generated during the formation of peroxyacetic acid uroporphyrin I. Destruction of porphyrins is found in the same reaction and can be prevented bydesferrioxamine, indicating that it is due to hydroxyl radicals. The formation of peroxyacetic acid- and hydroxyuroporphyrin I derivatives are uroporphyrinogen I concentration dependent. These derivatives can only be formed when uroporphyrinogen I is accumulated to a certain concentration (approx. 1-2 ~M) and the formation is then proportional to the uroporphyrinogen I concentration. The peroxylation reaction has been shown to take place only at the acetic acid side-chains of porphyrinogen and not at the propionic acid side-chains. The peroxylation reaction can therefore take place whenever a porphyrinogen with an acetic acid substituent is accumulated. Oral charcoal therapy failed to reduce the porphyrins accumulated in vivo in a patient with CEP. Uroporphyrin I, the major porphyrin accumulating in CEP, was not excreted into bile and interruption of the enterohepatic circulation by binding porphyrins onto charcoal therefore does not benefit CEP. It may, however, be effective in the treatment of hepatic porphyrias in which the accumulated porphyrins are mainly excreted via the gut lumen.
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Lefley, Colin Richard. "Raman spectroscopic studies of porphyrins and porphyrin-protein complexes." Thesis, University of York, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239782.
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Wessendorf, Florian. "Supramolecular fullerene-porphyrin architectures = Supramolekulare Fulleren-Porphyrin-Architekturen." kostenfrei, 2010. http://d-nb.info/1000613593/34.
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Beavington, Richard. "Porphyrin arrays." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388909.
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Promarak, Vinich. "Porphyrin arrays." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249614.
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Zhang, Wei. "Porphyrin arrays." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494395.
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Tannert, Sebastian. "Energy and electron transfer in porphyrin-phthalocyanin-porphyrin heterotrimers." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16850.
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Diese Dissertation leistet einen Beitrag zum Verständnis des Energie- und Elektronentransfers innerhalb von neuartigen supramolekularen Strukturen, die aus einem zentralen Phthalocyanin und zwei axial angekoppelten Porphyrinen bestehen. Zwei solcher Trimere, welche die koordinative Ankopplung von Porphyrinen über ein Silizium-Zentralatom des Phthalocyanins nutzen, wurden im Rahmen der Arbeit zum ersten Mal quantitativ bezüglich auftretender innermolekularer Transferprozesse charakterisiert. Ziel war die Beantwortung der Frage, ob diese Substanzklasse die wunschgemässe Vereinigung von Lichtsammlung und Ladungstrennung ermöglicht. Aus der Kombination der Messdaten, aufgenommen mit einer Vielzahl von Messverfahren, konnten für die beiden untersuchten Trimere in zwei unterschiedlich polaren Lösungsmitteln die Ratenkonstanten der Energie- und Ladungstransferkanäle ermittelt werden. In allen Fällen findet ein effizienter Ladungstransfer von den Porphyrinen zum Phthalocyanin und ein Lochtransfer vom Phthalocyanin zu einem der beiden Porphyrine statt. Dieses Ergebnis bestätigt die Erwartung, dass Lichtsammlung und Ladungstrennung in diesem Molekül vereint auftreten. Zusätzlich zu den beiden oben erwähnten Prozessen findet je nach Lösungmittelpolarität und Struktur der Porphyrine ein dem Energietransfer paralleler Elektronentransfer und ein Ladungsrücktransfer statt. Allerdings zerfällt der ladungsseparierte Zustand zu schnell, was eine praktische Nutzung der untersuchten Verbindungen in Solarzellen noch verhindert und ihre Weiterentwicklung erfordert.This thesis contributes to the comprehension of energy and electron transfer within novel supra-molecular structures, denominated triads, consisting of a central phthalocyanine axially-coupled to two porphyrins. In the course of this thesis, two of the trimers, were quantitatively characterized regarding their intramolecular transfer processes. Both feature a dative bond between the porphyrins and the phthalocyanine via the central silicium atom of the latter. These investigations aimed at answering whether this class of compounds allows the desired combination of light harvesting and charge separation. The rate constants of both investigated trimers in two solvents with different polarity were determined by the combination of data from a variety of measurement methods. An efficient charge transfer from the porphyrins to the phthalocyanine and a hole transfer from the phthalocyanine to one of the porphyrins occurs in all investigated cases. This result confirms the prospect that light harvesting and charge separation can occur combined in one molecule. Depending on solvent polarity and the structure of the porphyrines, electron transfer parallel to the energy transfer and a charge back transfer takes place in addition to both above-mentioned processes. However, the charge-separated state of the investigated substances decays to fast, still preventing a practical utilization of these compounds in solar cells and necessitating further developments.
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Sek, Sau Yin. "The synthesis of haematoporphyrin derivative III and other novel porphyrins /." Title page, table of contents and abstract only, 1990. http://web4.library.adelaide.edu.au/theses/09PH/09phs4622.pdf.
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Iakushev, Aleksei A. "Amination catalysée par des sels de palladium ou de cuivre pour la synthèse de polymacrocycliques contenant des fragments aza éthers-couronnes, porphyrines et calix[4]arènes." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT221/document.
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Les composés polymacrocycliques présentent un grand intérêt grâce à leurs caractéristiques remarquables de coordination. Pour la première fois, l’approche synthétique fonctionnelle aux diverses composés bi- et polycycliques contenant plusieurs fragments d’éthers aza-couronnes, aux cryptands et aux supercryptands à base d’éthers aza-couronnes a été élaborée par Krakowiak et ses collaborateurs au début des années 1990, par l’usage de simples réactions de substitution nucléophile. Actuellement, les composés hétéropolymorphes polymacrocycliques, capables de former des complexes polynucléaires avec différents métaux présentent le plus grand intérêt. Dans la grande majorité des travaux la synthèse de presque toutes les composés polymacrocycliques a été réalisée à l’aide des méthodes non orthodoxes, à l’exception des molécules, composées de plusieurs macrocycles porphyriques (de la diade et de la triade), pour l’obtention desquelles ont été appliquées les réaction de Suzuki, le couplage de Sonogashira et la réaction de Heck. Le laboratoire de synthèse organominérale de la Faculté de chimie de l’Université d’Etat de Moscou a accumulé une riche expérience dans l’utilisation de l’amination pallado-catalysée pour la synthèse de diverses composés macrocycliques et polymacrocycliques, et, actuellement, on étudie activement l’arylation cupro-catalysée des di- et polyamines. À cet égard, l’étude de l’amination cupro-catalysée pour la synthèse de composés polymacrocycliques qui contiennent comme connecteurs des diamines et des polyamines a permis développer des méthodes de catalyse métallique et d’obtenir de nouveaux types de conjugués polytopiques et polymacrocycliques, qui comprennent dans leur composition structurelle des fragments éthers aza-couronnes, porphyrines et calixarènes, étudiés pour leur capacité à détecter des cations des métalliques.Le but de ces recherches est de développer des méthodes catalytiques de synthèse de conjugués polymacrocycliques qui contiennent dans leur composition structurale des fragments éthers aza-couronnes, des porphyrines et des calix[4]arènes et d’étudier leurs capacités à détecter des cations métalliques. Pour atteindre cet objectif, il est nécessaire de résoudre les problèmes suivants: 1) établir la généralité de l’amination catalysée par le Cu(I) des dérivés éthers aza-couronnes et des porphyrines contenant des halogènes et de synthétiser les dérivés aminés; 2) développer des méthodes de la macrocyclisation catalytique pour obtenir des composés macrobicycliques et macrotricycliques qui contiennent dans leur structure des fragments éthers diaza-couronnes, des tétraazamacrocycles ( cyclènes et cyclames) et des calix[4]arènes; 3) modifier les composés macrocycliques et macrobicycliques par des substituants fluorophores, y compris des porphyrines; 4) à l’aide de la spectroscopie UV et de la fluorescence, étudier la liaison cations métalliques-polymacrocycles et identifier les détecteurs potentiels moléculaires fluorescents et colorimétriquesPolymacrocyclic compounds are of great interest due to their unique coordination properties. The first convenient synthetic approach to various polycyclic compounds containing several azacrown-ether moieties, to cryptands and supercryptands, based on azacrown-ethers, has been developed by Krakowiak and coworkers in the beginning of 1990s using simple nucleophilic substitution reactions. At present time heteropolytopic polymacrocyclic compounds, capable of forming polynuclear complexes with various metals, attract the utmost interest. In the majority of publications dealing with the synthesis of polymacrocyclic compounds non-catalytic approaches were applied, except for several porphyrin dyads and triads, which were obtained using Suzuki, Sonogashira and Heck reactions. The laboratory of organoelement compounds of Chemistry Department of Lomonosov Moscow State University has a great experience of the application of Pd-catalyzed amination reactions for the synthesis of polymacrocyclic compounds, nowadays Cu-catalyzed arylation of di- and polyamines is under investigation. Bearing it in mind we have found the research for Cu-catalyzed amination to be important in synthesis of polymacrocyclic compounds containing di- and polyamine linkers; as well as the synthesis of new types of polytopic polymacrocyclic conjugates, bearing azacrown-ether, porphyrin and calixarene moieties, by means of Pd- and Cu-catalyzed reactions; and studying their properties as metal cations detectors.The aim of the research is to develop catalytic synthetic approaches to polymacrocyclic conjugates, bearing azacrown-ether, porphyrin and calix[4]arene moieties, and to study their abilities as detectors for metal cations. For this purpose it is necessary to carry out the following investigations: 1) to study the regularities of Cu(I)-catalyzed amination of halogen derivatives of azacrown-ethers and porphyrins and to synthesize corresponding amino derivatives; 2) to develop the methods for the catalytic macrocyclization aimed at the synthesis of macrobicyclic and macrotricyclic compounds, containing diazacrown-ether, cyclen, cyclam and calix[4]arene moieties; 3) to introduce fluorophoric fragments (including porphyrins) into macrocyclic and macrobicyclic compounds; 4) to investigate metal cations binding by thus synthesized polymacrocycles using UV and fluorescent spectroscopy, and to find possible fluorescent and colorimetric detectors among them
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Abeykoon, Brian. "Conception, synthèse et caractérisations de MOFs à base de porphyrines." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1259/document.
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Les porphyrines sont des composés macrocycliques naturels étudiés de manière approfondie en tant que mimétiques enzymatiques ou catalyseurs d'oxydation en milieu homogène. L'incorporation de porphyrines dans des réseaux de polymères de coordination métal-organique (MOFs), qui constituent une famille de composés cristallins poreux connus pour leur diversité structurelle, pourrait conduire à des matériaux constitués de réseaux étendus présentant les mêmes propriétés que les systèmes homogènes. Toutefois de nombreux travaux ont montré que la limitation majeure pour des applications à grande échelle des MOFs est leur stabilité.La stabilité de ces matériaux peut être accrue en employant des cations métalliques de valence élevée dans l'unité de construction inorganique (tels que Fe3+, Al3+, Zr4+) et / ou en modifiant la fonction coordinante du ligand organique.Ce travail est relatif à l'étude de la réactivité de ligands porphyriniques portant diverses fonctions coordinantes, avec des ions métalliques de valence élevée. L'influence des paramètres de synthèse et la caractérisation approfondie de ces MOFs ont été réalisées par une combinaison de techniques expérimentales (diffraction des rayons X, analyse thermogravimétrique, spectroscopie UV-vis, spectroscopie infrarouge, études de sorption, etc.). Dans un premier temps, l'étude s'est focalisée sur des MOFs porphyriniques à base de groupements carboxylates stables connus, ce qui a conduit à de nouvelles variantes de ces matériaux. Dans un second temps il est démontré que les topologies des réseaux observées sur un ligand porphyrinique à base carboxylate peuvent être étendues à d'autres fonctionnalités avec la synthèse d'un nouveau MOF à base de tétrazolate. L'amélioration de la stabilité a également été explorée avec des ligands portant des fonctions phénol qui ont abouti à l'élaboration de nouveaux réseaux de coordination. La synthèse et l'étude de stabilité d'un MOF porphyrinique à base de gallate est rapportée. L'évaluation préliminaire de l'activité catalytique de certains des MOFs élaborés est également décritePorphyrins are important macrocyclic compounds which are prevalent in nature and have been extensively studied by chemists in homogeneous catalysis as enzyme mimics. Incorporating porphyrins in metal-organic frameworks (MOFs) offer an ideal opportunity to obtain material with extended frameworks possessing the same properties as the homogenous systems. Much work has been done on porphyrinic MOFs but their stability remains a problem and a major limitation for possible wide scale applications. In literature, more stable MOFs have been realised using high valent metal ions in the inorganic building unit (such as Fe3+, Al3+, Zr4+) and/or by using more basic functionalities in the organic linker. However, regarding porphyrinic MOFs, little work is reported with ligands based on functionalities other than carboxylic acid groups. Therefore, our work focused on investigating the reactivity of porphyrinic ligands carrying various functionalities with high valent metal ions. More precisely, we focused on the design, synthesis optimisation and characterisation of such materials. This included studying existing stable carboxylate porphyrinic frameworks with a goal of incorporating new functionalities, which led to new variations of these materials. Our work also demonstrated that the framework topologies observed with carboxylate based porphyrinic ligand can be expanded to other functionalities with the synthesis of a new tetrazolate based porphyrinic MOF. MOF synthesis was also investigated with phenolate functionalised ligands and resulted in the first gallate based porphyrinic MOF reported. The stability of this new material was assessed. This manuscript discusses the synthesis and the characterisation of these MOFs via a combination of experimental techniques (X-ray diffraction, TGA analysis, UV-vis spectroscopy, IR-spectroscopy, sorption studies etc.). The preliminary evaluation of the catalytic activity of some of the MOFs is also described
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Huo, Zhaohui. "Polyoxometalate - porphyrin hybrids systems : application for the photocurrent generation and the photocatalysis." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF032/document.
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Des films du type polyoxométallates-porphyrines ont été synthetisés et sont basés sur des interactions du types covalentes ou électrostatiques. Les films polyoxométallates–porphyrines sont obtenus par électro-oxydation de l’octaéthylporphyrine de zinc (ZnOEP) ou la 5,15-ditolylporphyrine (H2T2P) en présence de différents types of polyoxométallates (POMs) portant deux groupes pyridyles pendants (py-POM-py) Trois type de systèmes py-POM-py ont été utilises : i) un Lindqvist polyoxovanadate fonctionalisé via deux groupes tris-alkoxo , ii) un derive organosilyl fonctionalisé du type Keggin ou Dawson, et iii) des briques du type Dawson [P2W15V3O62]9− fonctionalisée avec des groupements organiques bis-pyridine de géométrie variée via un greffage diolamide). Tous ces films ont été testé pour la génération de photocourant et la photocatalyse de la réduction de métaux (Ag et Pt). Des films électrostatiques POM-porphyrin ont été également préparés par incorporation de polyanion du type Preyssler [NaP5W30O110]14- sur les films de porphyrine polycationic (poly-ZnOEP) électropolymérisés avec des espaceurs viologènes ou bis-viologènes. [NaP5W30O110]14- agit comme relais d’électron entre une porphyrine excitée ZnOEP* et le viologène (ou le bis-viologène) retardant la recombinaison de charge ce qui permet une augmentation du photocourant. Enfin, des nanoparticules POM@NPs (Pt, Au, Ag) ont été introduites en surface de copolymère polycationique à base de bis-porphyrine par métathèse afin d’augmenter l’efficacité de la génération de photocourant. La résonance de plasmon de surface localisée qui se produit à la surface des nanoparticules d'argent a sensiblement améliorée l'excitation électronique de porphyrinePolyoxometalates-porphyrin hybrid films were synthesized based on covalent or electrostatic interactions. Copolymeric polyoxometalate–porphyrin films were obtained by the electro-oxidation of zinc octaethylporphyrin (ZnOEP) or 5,15-ditolyl porphyrin (H2T2P) in the presence of a different type of polyoxometalates (POMs) bearing two pyridyl groups (py-POM-py). Three type of py-POM-py have been used: i) a tris-alkoxo functionalized Lindqvist polyoxovanadate, ii) an organosilyl functionalized Keggin-type [PW11Si2O40C26H16N2]3- and Dawson-type [P2W17Si2O62C26H16N2]6-, and iii) a bis-pyridine-substituted organo-polyoxometallic bricks using [P2W15V3O62]9− diolamide-grafting method with various geometries of the pendant group. All are applied for photocurrent generation and photocatalytical recovery of metals (Ag and Pt). Electrostatic POM-porphyrin films were also prepared by incorporated Preyssler type polyanion [NaP5W30O110]14- onto the electropolymerized polycationic porphyrin (poly-ZnOEP) with viologen or bis-viologen as spacers. [NaP5W30O110]14- as an efficient electron shuttle between the excited ZnOEP and viologen (or bis-viologen) which effectively retarded the fast charge pair recombination and enhanced the photocurrent magnitude. Later, we introduced nanoparticles POM@MNPs to a bis-porphyrin copolymer through metathesis reaction to further improve the efficiency of the photocurrent generation in which the localized surface plasmon resonance that occurs at the surface of silver nanoparticles has substantially enhanced the electronic excitation of surface-anchored porphyrin
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Jones, Liza T. "Nitrogen dioxide sensing using porphyrin and porphyrin-calixarene hybrid LB films." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397502.
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Alemán, Elvin A. "PHOTOCHEMISTRY AND PHOTOPHYSICAL CHARACTERIZATION OF PORPHYRIN & N-CONFUSED PORPHYRIN DYADS: PORPHYRIN PHOTOPHYSICAL PROPERTIES AND ELECTRON AND ENERGY TRANSFER." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1161633478.
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Hori, Takaaki. "Studies on giant porphyrin wheels and on aggregation behavior of porphyrin family." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120685.
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Pijeat, Joffrey. "Anthracenylporphyrin based building blocks for the bottom-up fabrication of nitrogen-doped graphene nanostructures." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS346/document.
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La synthèse de graphène par approche « bottom-up » fait l’objet de nombreux travaux de recherche ayant pour but de contrôler les propriétés électroniques et optiques de ce matériau par la fabrication de nanostructures avec une précision atomique. D’autre part, le contrôle de dopant dans le graphène permettant d’en moduler les propriétés suscite un grand intérêt et dans ce contexte l’utilisation de porphyrines avec un taux d’azote contrôlé est attrayante. Par leurs ressemblances structurelles, les porphyrines π-étendues peuvent être considérées comme des nanoparticules de graphène dopées à l’azote (GQDs) présentant de fortes propriétés infrarouge tandis que les briques de construction à base de porphyrines peuvent être utilisées pour la synthèse sur surface de deux type de nanoarchitectures de graphene appélées nanorubans (GNRs) et nanomèches (GNMs). Cette thèse a pour objectif de développer la synthèse de porphyrines à base d’anthracenes et de les utiliser comme précurseurs pour la fabrication de nanostructures. La première partie de cette thèse est dédiée à la synthèse organique de différentes anthracenylporphyrines et à l’étude de leurs assemblages sur surface dans la chambre d’un microscope à effet tunnel. La seconde partie est dédiée à l’étude de formation de porphyrines π-étendues via une méthode pyrolyse flash pouvant activer thermiquement des réactions de couplage par déhydrogenation entre des hydrocarbures aromatiques polyycliques (PAHs) et des porphyrines. La dernière partie est dédiée à la modification post synthétique d’une tetrabromoanthracenylporphyrine par addition de PAHs via la réaction de couplage de Suzuki-Miyaura et à la caractérisation des propriétés optiques de ces porphyrines nouvellement forméesThe synthesis of graphene via bottom-up approach is a hot topic of research that aims to control the electronic and optical properties of this material by the fabrication of atomically precised nanostructures. Moreover, the control of dopant in graphene is of great interest to modulate the properties of the material. In this context, the contribution of porphyrins with a controlled content of nitrogen is attractive in this context. Because of structural similarities with graphene quantum dots (GQDs), π-extented porphyrins can be regarded as nitrogen-doped GQD with promising NIR properties. Porphyrins are convenient building blocks for the synthesis on surface of nanoarchitectures of graphene called nitrogen-doped Graphene Nanoribbons (GNRs) and Graphene NanoMeshes (GNMs). This thesis aims to develop the synthesis of symmetrical and robust porphyrins with anthracenes and to use them as precursors for the fabrication of nanostructures. The first part of this thesis is dedicated to the organic synthesis of variety of anthracenylporphyrins and the study of their assemblies on surface in a chamber of a Scanning Tunneling Microscope. The second part is dedicated to the study of formation of π-extended porphyrins via a method of flash pyrolysis able to thermally activate dehydrogenative coupling reactions between Polycyclic Aromatic Hydrocarbons (PAHs) and porphyrins. The last part is dedicated to the post synthetic modification of a tetrabromoanthracenylporphyrin with additional PAHs via Suzuki-Miyaura coupling and the characterization of the optical properties of the resulting porphyrins
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Harper, Shannon R. "Diporphyrins linked by two-atom bridges synthestic, structural and theoretical studies." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/68643/1/Shannon_Harper_Thesis.pdf.
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The syntheses, properties and electronic structures of a series of porphyrin dimers connected by two-atom bridges were compared. The study found that an azo linker results in the most efficient electronic communication between the two porphyrin rings, and is the superior connector for dimers, trimers and oligomers in the design of nonlinear optical materials. This has implications for the design of molecular probes and sensors, photodynamic therapy, microfabrication, and three-dimensional optical data storage. The research led to the synthesis of a number of new porphyrin monomers and dimers, which were characterised using structural, spectroscopic and spectrometric techniques.
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Sedghi, Gita. "Porphyrin single molecular wires." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539493.
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Webb, Matthew James. "Porphyrin dication association complexes." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611573.
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Mackay, Lindsey Gillian. "Porphyrin-based synthetic enzymes." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/272641.
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Maeda, Chihiro. "Chemistry of Porphyrin Assembly." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120686.
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Ikeda, Toshiaki. "Chemistry of Porphyrin Tapes." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124433.
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Rajapakse, Nimal. "Oxidations using dioxoruthenium (VI)-porphyrin complexes ; and studies on some organoruthenium-porphyrin species." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30767.
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The oxidation of three alkyl thioethers, phenol and 2-propanol by trans-dioxo ruthenium porphyrin species, and the synthesis, characterization and reactivity of several new ruthenium porphyrin complexes are described in this thesis.
The trans-dioxo species Ru(Porp)(O)₂ [Porp= the dianions of 5,10,15,20-tetramesitylporphyrin (TMP) and 5,10,15,20-(2,6-dichlorophenyl)porphyrin (OCP)] selectively oxidize diethyl-, di-n-butyl- and decylmethyl- sulfides to the corresponding sulfoxides at room temperature. The reaction is first order in [Ru] and in [thioether]. The second order rate constants for the first O-atom transfer from the Ru(TMP) system are: 7.54xl0⁻³, 1.23xl0⁻² and 1.14x10-¹ M⁻¹ s⁻¹ respectively for the three thioethers at 20.0 °C. The activation parameters for the O-atom transfer process are also determined: for Et₂S, ∆H‡= 58.3 kJ mol⁻¹ and ∆S‡= -86 J K⁻¹ mol⁻¹; for nBu₂S, AH‡= 47.4 kJ mol⁻¹and ∆S‡= -120 J K⁻¹ mol⁻¹; for DecMeS, ∆H‡= 56.5 kJ mo⁻¹ and ∆S‡= -70 J K⁻¹ mol⁻¹. A second order rate constant of 7.23xl0⁻²M⁻¹s⁻¹ is measured at 20.0 °C for the oxidation of Et₂S by Ru(OCP)(O)₂. The intermediates Ru(TMP)(OSEt₂)₂, Ru(TMP)(OSEt₂)(OSEt₂) and the final product Ru(TMP)(0SEt₂)₂,where O and S refer to O- and S- bonded sulfoxide, are observed by ¹H nmr, and the last mentioned is isolated and characterized. A mechanism is proposed, based on electrophilic attack of the O=Ru=O moiety on :SR₂ to form bis-O-bonded species which subsequently isomerizes to bis-S-bonded species via mixed species. The Ru(TMP)(O)₂/Et₂S/O₂ system at room temperature is catalytic in complex, but produces only about 5 turnovers due to poisoning of the catalyst by the reaction product. The same system at >65 °C gives higher turnovers, but now porphyrin ligand degradation is observed, perhaps via oxidation by the O=Ru=O moiety. The Ru(OCP)(0)₂/Et₂S/O₂ system at 100 °C catalytically oxidizes Et₂S to Et₂SO and Et₂SO₂ (in ~ 4:1 ratio) and the porphyrin ligand does not undergo oxidative destruction. The Ru(TMP)(O)₂ species reacts with phenol via an observed intermediate Ru(TMP)(p-O(H)C₆H₄OH)₂ to form Ru(IV)(TMP)(OC₆H₄OH)₂, a paramagnetic (S=l) complex which is isolated and characterized. The oxidation reaction is first order in both [Ru] and [phenol] with a second order rate constant 6.90x10⁻² M⁻¹ s⁻¹at 20.0 °C. A mechanism based on electrophilic attack by the O=Ru=O moiety on the aryl ring followed by proton migration is proposed. This mechanism also explains the formation of some free para-benzoquinone and 1 equivalent of water per Ru. No ortho-benzoquinone is formed in the reaction.
Preliminary ⁻H nmr studies reveal that 2-propanol is oxidized to acetone by Ru(TMP)(O)₂. A paramagnetic species (S= 1) was isolated as the only porphyrin product but not characterized.
A range of novel ruthenium porphyrin complexes is also prepared. The reaction of acetylene with the four-coordinate Ru(TMP) species forms [Ru(TMP)]₂(u-C₂H₂), the first reported organometallic ruthenium porphyrin dimer. The complexes, Ru(TMP)(PhCCPh) and Ru(TMP)(PhCCH), the first π-bonded alkyne species in ruthenium porphyrin chemistry, are characterized in solution. The π-bonded alkene complexes Ru(TMP)(CH₂CH₂) OPrOH).(iPrOH) and Ru(TMP)(CH₂CH₂) are isolated and characterized, while the Ru(TMP)(cyclohexene) complex is characterized in situ. The Ru(TMP)(OSEt₂)₂ complex is isolated also by the reaction of Ru(TMP)(CH₃CN)₂with Et₂SO. The Ru(TMP)(L)₂ complexes, L= OSMe₂, OSnPr₂ and OSnBu₂ are also prepared via the above method and characterized. Some new Ru(OCP) complexes, (the monocarbonyl, the bis-acetonitrile and the dioxo- species) are also isolated and characterized.Science, Faculty of
Chemistry, Department of
Graduate
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Chitta, Raghu. "Studies on self-assembled porphyrin-fullerene and porphyrin-carbon nanotube donor-acceptor conjugates." Diss., Wichita State University, 2007. http://hdl.handle.net/10057/1485.
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The research presented in this dissertation deals with the syntheses, characterization, electrochemical and photophysical studies of porphyrin-fullerene or porphyrin-carbon nanotube based donor-acceptor conjugates. The first chapter provides an introduction to the research presented in this thesis. A summary of primary events that occur in natural photosynthetic systems, the necessity and importance of the artificial photosynthetic mimics for light energy harvesting, the importance of non-covalent porphyrin-fullerene donor-acceptor models over covalent ones and some recent developments in model biomimetic systems are presented. Additionally, the importance of the nano-sized materials, solubilization of carbon nanotubes via chemical functionalization and utilization of these nanomaterials in building donor-acceptor nanohybrids is discussed. The second chapter discusses the syntheses and characterization of the control compounds and physical methods employed to monitor the photochemical pathways occurring in the studied donor-acceptor conjugates. The third chapter focuses on the design and syntheses of rigid, noncovalent “two-point” bound porphyrin-fullerene dyads assembled via crown etherammonium cation complexation and axial coordination or ∏-∏ interactions. The effect of axial ligation or ∏-∏ interactions in addition to the crown etherammonium cation binding, on photochemical charge stabilization in these supramolecuar dyads is systematically investigated. The fourth chapter deals with the photoinduced electron-transfer processes occurring in supramolecular triads comprised of cis and trans functionalized bis-18-crown-6 porphyrin self assembled with fullerene functionalized with pyridine or alkyl ammonium cation entities. The 1:2 stoichiometric supramolecular porphyrin:fullerene conjugates are obtained by utilizing either “two-point” binding methodology involving metalligand coordination and alkyl ammonium cation-crown ether binding or the latter type of binding solely. Variation of metal ion in the porphyrin (zinc or
magnesium) cavity results in the free energy changes of charge separation and charge recombination. Employing higher number of the acceptor entities improves the electron-transfer rates, with kCS being 2-3 orders of magnitude higher than the kCR, thus indicating charge stabilization in these conjugates. The fifth chapter discusses the role of a secondary electron donor in generating longlived charge separated states in supramolecular conjugates formed via crown ether-ammonium cation binding. The sixth chapter presents the application of the present type of conjugates. Here, potassium ion-induced switching of intrato intermolecular electron transfer in crown ether appended porphyrin-fullerene donor acceptor conjugates is demonstrated. Investigations in the seventh chapter involve solubilization of single wall carbon nanotubes by ∏-stacking with pyrene functionalized imidazole or phenyl moieties and subsequent utilization of these nanotubes to build supramolecular donor-acceptor nanohybrids with donors such as porphyrin or napthalocyanine The compounds described in this dissertation were synthesized and characterized by proton NMR and ESI-Mass spectroscopy. Binding constants pertaining to the formation of various complexes were obtained by using UV-visible, fluorescence and ¹H NMR spectral data. Density functional theory (DFT) calculations were performed to gain insight into the structural aspects and orientation of the donor-acceptor groups in these supramolecular complexes. Electrochemical studies were performed to obtain free energy
changes for charge separation and charge recombination. Steady state and time resolved fluorescence emission studies in addition to transient absorption studies were employed to obtain charge separation and charge recombination rates and lifetimes of photo-induced electron transfer.Thesis (Ph.D.)--Wichita State University, College of Liberal Arts and Sciences, Dept. of Chemistry
"December 2007."
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Chitta, Raghu D'Souza Francis. "Studies on self-assembled porphyrin-fullerene and porphyrin-carbon nanotube donor-acceptor conjugates /." Diss., A link to full text of this thesis in SOAR, 2007. http://hdl.handle.net/10057/1485.
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Joseph, Jojo. "Photophysical Characterization of a Series of Self-Assembled Donor-Acceptor Dyads Containing Porphyrin and N-Confused Porphyrin Electron Donors and Studies of the Tautomerization of N-Confused Porphyrins." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1376062678.
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Merhi, Areej. "Synthèse de nouveaux assemblages à base de porphyrines organiques et organométalliques pour l’optique." Thesis, Rennes, INSA, 2013. http://www.theses.fr/2013ISAR0022/document.
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Au cours de cette thèse, nous avons synthétisé et caractérisé de nouveaux composés en utilisant le macrocycle porphyrinique comme brique moléculaire de départ. Le but de ce travail étant l’étude des propriétés optiques de ces nouveaux composés obtenus. Après avoir effectué l’étude bibliographique sur les porphyrines, nous avons fait une présentation générale des porphyrines symétriques et non symétriques, de leurs propriétés et de leurs synthèses. D’autre part, nous avons aussi considéré l’unité fluorène qui possède des propriétés photophysiques très intéressantes comme antenne collectrice de lumière. Puis, nous avons abordé des méthodes de synthèse permettant d’associer le macrocycle porphyrinique avec de nombreuses unités fluorènes. Cette association a pu être réalisée de différentes manières : soit de façon dendritique ou par connexion directe sur la porphyrine (dimère et trimère). Nous avons également décrit l’obtention d’une nouvelle famille de porphyrines substituées par des groupements organométalliques de type acétylure de ruthénium et de fer pour l’optique non linéaire de troisième ordre (ONL TO). Lors de la dernière partie de mes travaux de thèse, comme application de ces composés luminescents dans le rouge, nous avons reporté l’élaboration de différents dispositifs de diodes électroluminescentes (OLED) émettant dans le rougeDuring this thesis, we have worked on the synthesis and characterization of new compounds using the porphyrin macrocycle as a starting material. The aim, after synthesis, is to study the photophysical properties of these new molecules. A general bibliographic study was presented followed by introducing the synthetic methods of porphyrins and characterization means. Then, fluorene was considered to be an attracting unit due to its interesting photophysical properties: acting as efficient antennae for collecting light. First, we have presented the synthesis of porphyrin dendrimers having fluorenyl arms of different generations. That is to test the effect of number of fluorenes on the photophysical properties. Another way is to connect the fluorenes directly to the porphyrin core by synthesizing porphyrin dimer and trimer. We have also detailed the synthesis and characterization of a new family of porphyrin organometallic assemblies possessing ruthenium and iron moieties. In addition, a new organometallic porphyrin dendrimer bearing twelve ruthenium species was reported as well. These organometallic porphyrins are of interest in the third order of Nonlinear Optics (NLO). In the last chapter of this thesis we showed an example of application of porphyrin chemistry. We reported the elaboration of a new organic light emitting Diode (OLED) using these new porphyrins that emits in the red region
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Hammel, Jörg U. "Bakteriochlorophyllvorstufen und Pigment-Protein-Komplexe in Rhodospirillum rubrum ST3 und GN11." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-29780.
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Anderson, Sally. "Templated synthesis of porphyrin oligomers." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/251546.
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MacAlpine, Jill. "Chemistry at the porphyrin periphery." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0018/NQ46380.pdf.
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Hasan, Saleem. "Porphyrin-catalyzed oxidation of trichlorophenol /." Access abstract and link to full text, 1994. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9500706.
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Wilson, Craig J. "Large porphyrin-based π-systems." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432265.
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Elgie, Kerry J. "Combinatorial methods in porphyrin synthesis." Thesis, University of Essex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517452.
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Wicks, Matthew. "Porphyrin arrays for FET devices." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:341c9048-3bdf-4935-92d4-e90519087962.
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Field effect transistors (FETs) are a key component of modern electronic devices. They require a semiconducting material that is traditionally made from doped silicon. Recently however it has been shown that porphyrin systems can be used in the same capacity. This thesis therefore describes the investigation of new methods of porphyrin functionalization to synthesise 1,4,5,8-tetraazaanthracene-bridged porphyrin arrays, and their application to the synthesis of extended arrays for use in FETs. The 1,4,5,8- tetraazaanthracene bridge is synthesised through the condensation of a porphyrin alpha-dione with 1,2,4,5-tetraaminobenzene. Accordingly, the synthesis of an extended array requires a porphyrin tetra-one monomer unit. Two methods for the synthesis of porphyrin tetra-ones have been investigated. The first approach attempts to adapt Knudsen's hydroxylation of an aryl halide by sodium benzaldoximate to a porphyrin system. Initial regiospecific halogenation of a porphyrin has been successfully achieved. However when hydroxylation was attempted, partial dehalogenation of the substrate was observed; and when applied to the synthesis of the porphyrin tetra-one the methodology failed. The second approach involves the allylic oxidation of a chlorin (a reduced porphyrin) on silica. The transformation's mechanism has been thoroughly investigated and it has been successfully applied to the synthesis of a porphyrin tetra-one. This methodology has then been applied to the synthesis of extended porphyrin arrays. A sample incorporating 12 porphyrin units has been successfully constructed. It has been characterised by NMR, MALDI, GPC and UV-VIS spectroscopy. By comparison with previous results it has been concluded that the aromatic system- which spans 181 Ǻngstroms from end to end- can be described as a series of weakly interacting chromophores, in agreement with theoretical predictions made by Hush. In addition a medium-scale synthesis of an array incorporating four porphyrins has been achieved so that it may now be tested as the semiconducting material in a FET.
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Gibson, Elizabeth. "Porphyrin probes for xanthine oxidase." Thesis, University of York, 2007. http://etheses.whiterose.ac.uk/9915/.
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Alemán-García, Miguel Angel. "Porphyrin-based multicomponent supramolecular assemblies." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610305.
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Levy, Esther Gillian. "Porphyrin-catalysed acyl transfer reactions." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627031.
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Liu, Pengpeng. "New templates for porphyrin nanorings." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:7d05f302-7002-4fc2-81ea-fc106a8e2e24.
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New templates based on the structures of cyclodextrin and ferrocene have been developed for porphyrin nanoring syntheses. Flexibility can be taken into account of the molecular template design. The flexibility of butadiyne bonds allow the formation of a 5-porphyrin nanoring, which is the smallest fully-conjugated porphyrin nanoring to date. Chapter 1 describes the general information of porphyrin, cyclodextrin and ferrocene, which are used as basic structures in the thesis. The polymer chemistry of porphyrins is reviewed as the background knowledge of the work. Meanwhile, chelate cooperativity of supramolecular systems and the corresponding measurement method are introduced. Chapter 2 presents the chemistry towards 6- and 7-porphyrin nanorings using molecular templates T6* and T7*, which are based on the a- and β-cyclodextrin scaffolds. The cooperativity of respective template-nanoring complexes was investigated by UV-vis titrations. Chapter 3 describes the Vernier-templated syntheses of porphyrin nanorings using T7* and different linear porphyrin oligomers (l-P2, l-P4 and l-P8). Both chapters focus on the influences of spatial preorganization and flexibility to the cooperativity of supramolecular systems. Chapter 4 introduces the chemistry towards a ferrocene-based five-dentate template T5 which successfully directed the syntheses of 5-porphyrin nanorings. Investigation of the cooperativity in the nanoring-template system is presented. Chapter 5 investigates the cooperativity between T5 and linear porphyrin oligomers in detail; and focuses on the contribution of partially-bound complexes in the measurement of equilibrium constants of the host-guest systems. Both chapters focus on the influences of intramolecular strain to the cooperativity in supramolecular systems. Chapter 6 provides experimental procedures and characterization data of the known and novel compounds synthesized in the course of completing the thesis.
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Bludin, Alexey O. "Peptide-Porphyrin Self-Assembled Materials." Bowling Green State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1308097842.
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Hata, Hiroshi. "Regioselective modifications of porphyrin analogs." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144217.
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Gong, Juliane Qiaochu. "Excitation delocalization in porphyrin nanorings." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:94d52e56-be55-4931-9671-1cc178b20489.
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This thesis is concerned with the photophysical properties of porphyrin nanorings. In particular, the impact of symmetry, conformation and structure on electronic delocalization, radiative rate and emission polarization memory loss are investigated and exciton migration is probed on a number of porphyrin nanorings. Ultrafast time-resolved spectroscopy techniques are used to study the fluorescence dynamics of these newly synthesized compounds. First, photophysical implications of lifting the rotational symmetry are investigated using a number of small porphyrin rings specially modified for this purpose. For more severe symmetry distortions, increased optical transitions to the lowest excited state have been observed, which is dipole-forbidden due to symmetry reason. Also, the degeneracy in the allowed first excited state is lifted for broken symmetry, leading to a polarization switching effect. The effect of conformation on emission depolarization memory loss is studied using a series of similarly sized porphyrin rings with rigid structures exhibiting various degrees of out-of-plane distortion. Excitations can access any segment on the nanoring and this is not affected by the conformation. However, severe out-of-plane distortions lead to lowered emission anisotropy; this conclusion is further supported by molecular dynamics simulation. Finally, exciton migration within porphyrin ring complex is investigated. Russian doll complex which consists of two concentric porphyrin rings acts as a single emitter, even though spectral features of both ring components are found in the absorption spectrum. Lifetimes and radiative rates of the complex and the individual rings components further confirmed that excitons migrate from the outer 12-ring to the inner 6-ring within 40 ps. A nanotube consisting of two conjugated 6 porphyrin rings linked by dimers acting as staves also exhibits energy migration. Emission anisotropy measurements suggest that excitation is transferred from the staves of the nanotube to the ring plane effectively within 280 fs.
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Chauhan, Prashant. "Porphyrin derivatives for functional nanomaterials." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423501.
Full textAbstract:
The thesis consists of two major research topic i.e. Porphyrin and Nano crystalline cellulose.
The porphyrin project started with the production of porphyrin chromophores for dye sensitized solar cells. These derivatives were required as references for an ongoing project of the research group that hosted me. In addition, some porphyrin-porphyrin tweezers were prepared using a one pot synthetic methodology developed in our lab, based on the use of trichloro triazine as a linker. These derivatives were necessary for collaboration with Professor Nina Berova at Columbia University that studies their use for the determination of the absolute configuration of chiral molecules by circular dichroism. After this training period, the thesis project continued with an original research based on the use of click-chemistry for porphyrin functionalization.
The nanocellulose project started with the production of nanocrystalline cellulose from microcrystalline cellulose by acid hydrolysis. The nanocellulose has chemically modifiable OH groups on the surface. This allows the use of a wide range of chemical reactions for its functionalization. The linking of a pH sensitive dye on the surface of NCC was studied. In addition, several strategies were being employed for the functionalization of NCC with other groups such as cationic substituents (using (2,3-epoxypropyl)trimethylammonium chloride), amino (using epichlorohydrin and 3-aminopropyltrimethoxysilane), carboxy (using ammonium persulfate and TEMPO). Out of various chemical modifications carried out on NCC, the TEMPO mediated carboxylation for introduction of carboxyl group on NCC was proved to be easy, convenient and even resulted in high degree of functionalization. Using these material and typical carbodiimide chemistry, functional groups such as porphyrins (that acts as a sensitizer for singlet oxygen production) and a nitro-derivative (capable of producing NO upon irradiation) were prepared. These features are under study to verify their potential in various therapeutic applications.La Tesi si compone di due principali temi di ricerca che riguardano le porfirine e la nano-cellulosa. Il progetto sulle profirine è iniziato con la produzione cromofori per celle solari a sensibilizzatore organico. Questi derivati sono stati usati come riferimento per un progetto sulla conversione della luce solare in energia che coinvolge il gruppo di ricerca che mi ha ospitato. Inoltre, sono stati preparati dei dimeri porfirina-porfirina, basati sull’uso di una procedura “one-pot” che impiega la triclorotriazina come linker. Questi derivati sono stati preparati nell’ambito di una collaborazione con la Professoressa Nina Berova (Columbia University) che studia il loro uso per la determinazione della configurazione assoluta di molecole chirali mediante dicroismo circolare. Dopo questo periodo di formazione, il progetto di tesi è proseguito con una ricerca originale, basato sull'uso di click -chemistry per la funzionalizzazione del macrociclo profirinico. Il progetto che riguarda la nanocellulosa, è iniziato con la produzione di cellulosa nanocristallina da cellulosa microcristallina mediante idrolisi acida. La nanocellulosa possiede dei gruppi OH modificabili chimicamente sulla superficie che consentono l'utilizzo di una vasta gamma di reazioni chimiche per la sua funzionalizzazione. Si è quindi studiata la funzionalizzazione della nanocellulosa con un colorante sensibile al pH sulla superficie dei nanocristalli. Inoltre, sono state valutate diverse strategie per la funzionalizzazione superficiale con gruppi cationici (utilizzando 2,3-epossipropil cloruro di trimetil ammonio), ammino (con epicloridrina e 3-amminopropiltrimetossisilano), carbossi (utilizzando persolfato di ammonio e TEMPO). Tra le varie strategie di funzionalizzazione esaminate, la carbossilazione mediata dal TEMPO si è dimostrata efficace e robusta. L'utilizzo di questi materiali e la chimica tipica delle carbodiimidi, ha permesso di legare covalentemente alla nanocellulosa gruppi funzionali come porfirine (che agisce come un sensibilizzatore per la produzione ossigeno singoletto) e un nitro- derivato (in grado di produrre NO sotto illuminazione). Questi materiali sono in fase di studio per verificare il loro potenziale in varie applicazioni terapeutiche.
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Biellmann, Thomas. "Edifices porphyrine-diaryléthène : synthèses et propriétés." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF021/document.
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Visant des applications en électronique moléculaire, de nouveaux édifices moléculaires combinant quatre dithiényléthènes (DTEs) et une porphyrine ont été synthétisés par de nouvelles voies de synthèse. Les études en solution par photochimie ou spectroélectrochimie des édifices tetraDTEs-porphyrine métallée ou base livre ont montré l’efficacité (62-88 pourcent) des photochromes en tant qu’interrupteurs et la possibilité de lire l’état des DTEs par la fluorescence de la porphyrine. Pour mieux comprendre les interactions électroniques DTEs- porphyrines, des édifices plus simples, bis(porphyrine)DTE, déjà partiellement étudiés dans la littérature, ont été explorés. L’ensemble de ces études à mis en évidence l’impact des métaux sur la capacité photochromique des édifices dithiényléthène – porphyrineThe main purpose of this thesis was the synthesis of new molecular structures, combining dithienylethenes and porphyrins, for applications in molecular electronics and spintronic. Metallated and free base porphyrins bearing four DTEs were characterizes and studied in solution by photochemistry and spectroelectrochemistry. The efficiency of switching of our systems reach 88 percent and strong quenching porphyrin’s fluorescence was reported. New synthetic pathways were investigated to prepare a broader scope of tetraDTEs-porphyrin derivatives. Moreover, to better understand the electronic communications between DTEs and porphyrins, a simpler bis(porphyrin)DTE molecular structure was synthetized and studied. These studies demonstrated showed the important role of the metal on photochromic behavior of dithienylethene – porphyrin architectures
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Burgess, Robert Marshall. "Ambient gas effects on thin film porphyrins and on Al/Porphyrin/Ag electroluminescent and electrochemical devices /." Thesis, Connect to this title online; UW restricted, 1986. http://hdl.handle.net/1773/11579.
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劉純晶 and Chunjing Liu. "Nonplanar and sterically encumbered ruthenium porphyrins and catalyticreactivity of ruthenium and manganese porphyrin complexes supported onMCM-41." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237423.
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Li, Yingfu. "Catalytic DNA molecules for porphyrin metallation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24327.pdf.
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Cho, Jeongguk. "Porphyrin-catalyzed reduction of nitroaromatic compounds /." Access abstract and link to full text, 1992. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9307476.
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Galia, Aslam B. B. "Photobactericidal properties of porphyrin containing polymers." Thesis, Queen Mary, University of London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312398.
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Zuurbier, Richard James. "Novel aspects of platinum porphyrin chemistry." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307537.
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Blake, Iain M. "Conjugated porphyrin systems for nonlinear optics." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365889.
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