Literatura científica selecionada sobre o tema "Réseaux organométalliques"
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Teses / dissertações sobre o assunto "Réseaux organométalliques"
Moussa, Jamal. "Architectures métallo-supramoléculaires photoluminescentes à ligands organométalliques quinoïdes et thioquinonoïdes : une nouvelle classe de réseaux de coordination". Paris 6, 2007. http://www.theses.fr/2007PA066481.
Texto completo da fonteLuc, Jérôme. "Propriétés optiques non linéaires et structuration photo-induite de nouveaux complexes organométalliques à base de ruthénium". Phd thesis, Université d'Angers, 2008. http://tel.archives-ouvertes.fr/tel-00351578.
Texto completo da fonteNous déterminons, à l'aide de diverses techniques expérimentales (DFWM, SHG, THG, Zscan), l'influence de la fonctionnalisation de ces structures moléculaires sur l'amélioration de leurs propriétés ONL du deuxième et troisième ordre en jouant notamment sur la nature du fragment accepteur et du transmetteur π-conjugué. Nous présentons les résultats de calculs théoriques de chimie quantique afin de proposer une étude ONL de ces complexes à l'échelle moléculaire. Enfin, nous complétons ce travail sur des complexes ruthéniumacétylure contenant un fragment azobenzène dans leur système organique p-conjugué, par la diffusion des rayons X aux grands angles (WAXS) et par l'étude, en régime picoseconde, de la dynamique de formation de réseaux de surface photo-induits (SRGs) en utilisant une technique d'holographie en transmission et la microscopie à force atomique (AFM).
Ramirez, Vidal Pamela. "Matériaux nanoporeux à haute surface spécifique pour le stockage et la compression de l’hydrogène". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0178.
Texto completo da fonteIn this thesis, the hydrogen adsorption performance of three families of large surface area porous materials: hyper-crosslinked polymers (HCPs), commercial activated carbons (CACs) and metal-organic frameworks (MOFs) was studied. Two interconnected parts constituted this study: (i) the experimental evaluation of hydrogen storage performance in the three families of materials; and (ii) the modelling of hydrogen storage in CAC and MOF at temperatures between 77 and 273 K and at pressures up to 14 MPa. Irreversible deformation in HCPs after hydrogen adsorption at 77 K and 14 MPa is reported here for the first time. The hydrogen adsorption isotherms obtained up to 14 MPa were fitted with the Modified Dubinin-Astakhov equation in order to determine the physical meaning of their parameters, which had not been revealed until now. The results obtained in this thesis will allow the prediction of hydrogen adsorption capacities at specific temperatures and pressures after an adequate characterization of the adsorbent material texture, which represents a significant saving of time and resources. The thesis is divided in chapters related to each family of studied. Finally, the conclusions and perspectives of this study are presented.This work was carried out in the team 402 "Biosourced Materials" of the Institut Jean Lamour (IJL - UMR CNRS 7198), hosted by the “Ecole Nationale des Techniques et Industries du Bois” (ENSTIB), at the University of Lorraine. Several partners have been involved in this project, such as: the Instituto Nacional del Carbón (INCAR - CSIC) in Oviedo, Spain; and the Laboratoire Énergies et Mécanique Théorique et Appliquée (LEMTA-UMR 7563 CNRS-UL) in Vandoeuvre lès Nancy in France
Achkar, Charbel. "Etudes de nanostructures magnétiques auto-organisées et épitaxiées par synthèse organométallique en solution sur des surfaces cristallines". Thesis, Toulouse, INSA, 2014. http://www.theses.fr/2014ISAT0037/document.
Texto completo da fonteThe elaboration of this thesis aims to characterize the magnetic and structural properties of magnetic nanostructures obtained by a new mixed physical / chemical synthesis method, called hybrid growth. The first part of the work consists in the development of thin metal films on substrates by cathode sputtering. Furthermore, the chemical synthesis conducted by organometallic chemistry on those thin films, results in an array of ultra-dense Co monocristallins hcp nanowires, or nanostructured Fe films. Additionally, The SEM/TEM observations and the X-ray diffraction measurements conducted on the substrates and induced by the crystlalline structure of the thin film, show the high impact on the magnetic nanostructures morphology and growth direction.Moreover, the magnetic measurements executed on the Co nanowires array show a strong magnetic anisotropy perpendicular to the substrate. This observation is obtained due to the magnetocrystalline anisotropy acting along the nanowire axis (Co hcp structure with the c axis parallel to the nanowire axis) in the same direction of the nanowires shape anisotropy. The magnetization within these structures is thermally stable. It follows a coherent magnetization reversal mode that has not been observed in the polycrystalline structures up to now. Finally, the self-organization of the nanowires as well as their high density and stable magnetization nominate this system for their application in high density magnetic storage devices
Mihalcea, Ionut. "Crystal chemistry of coordination polymers based on uranyl and mixed uranyl - lanthanide carboxylates". Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10119/document.
Texto completo da fonteThis thesis work concerns the synthesis, crystal structural study and thermal behavior of coordination polymers type uranyl and mixed uranyl-lanthanide aromatic carboxylates. Using a series of 7 aromatic carboxylate ligands, more than 25 new uranyl (so-called Uranyl-Organic Framework or UOF) and mixed uranyl-lanthanide coordination polymers have been synthesized and described in this manuscript. Some of the ligands have proven to be very prolific such as the isophthalic acid, which is present in 10 coordination polymers and with others (such as terephthalic acid) only one complex could be isolated. Some of the obtained phases contain typical monomeric or tetrameric SBUs and others possess unique features such as octanuclear SBU with an edge sharing CCI (U=O-U), linear trinuclear SBU or polymeric SBU delimiting large tunnel systems. The synthesis of all these phases conducted to a better understanding of the hydrothermal reactions and the influence of different parameters over the final reaction product. For each of the phases obtained pure the thermal behavior and thermal stability have been studied. These experiments offer a better understanding of the relation between the structure of the initial complex, the thermal degradation conditions and the nature of final oxide. Also for these phases the fluorescence emission spectra were recorded, offering information about the influence of different ligands or different type of SBUs over the typical uranyl spectrum
Mihalcea, Ionut. "Crystal chemistry of coordination polymers based on uranyl and mixed uranyl - lanthanide carboxylates". Electronic Thesis or Diss., Lille 1, 2012. http://www.theses.fr/2012LIL10119.
Texto completo da fonteThis thesis work concerns the synthesis, crystal structural study and thermal behavior of coordination polymers type uranyl and mixed uranyl-lanthanide aromatic carboxylates. Using a series of 7 aromatic carboxylate ligands, more than 25 new uranyl (so-called Uranyl-Organic Framework or UOF) and mixed uranyl-lanthanide coordination polymers have been synthesized and described in this manuscript. Some of the ligands have proven to be very prolific such as the isophthalic acid, which is present in 10 coordination polymers and with others (such as terephthalic acid) only one complex could be isolated. Some of the obtained phases contain typical monomeric or tetrameric SBUs and others possess unique features such as octanuclear SBU with an edge sharing CCI (U=O-U), linear trinuclear SBU or polymeric SBU delimiting large tunnel systems. The synthesis of all these phases conducted to a better understanding of the hydrothermal reactions and the influence of different parameters over the final reaction product. For each of the phases obtained pure the thermal behavior and thermal stability have been studied. These experiments offer a better understanding of the relation between the structure of the initial complex, the thermal degradation conditions and the nature of final oxide. Also for these phases the fluorescence emission spectra were recorded, offering information about the influence of different ligands or different type of SBUs over the typical uranyl spectrum