Dissertations / Theses on the topic 'Complexes des métaux de transition'
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Cauchy, Thomas. "Système magnétiques complexes avec des métaux de transition." Phd thesis, Université d'Angers, 2007. http://tel.archives-ouvertes.fr/tel-00346321.
Full textCauchy, Thomas. "Systèmes magnétiques complexes avec des métaux de transition." Angers, 2007. http://www.theses.fr/2007ANGE0047.
Full textA methodology based on the density functional theory has been used to study firstly, the unusual magnetic properties of organometallics raidcals of the [CpNi(dithiolene)] family with for exemple a strong antiferromagnetic coupling through a weak interaction, and secondly the exchange interaction in iron and manganese polynuclear systems with oxo bridging ligands. Therefore, the exchange coupling constants have been calculated for the complexes fe4 with a butterfly geometry, Fe5, Fe6, Mn4 butterfly type, Mn10, Mn19 and Mn25. We wera able to establish magnetostructurals correlations and correlations between the exchange coupling constants and the cations electronic configuration in the iron and manganese butterfly complexes. The results obtained for the others complexes with a higher nuclearity show similar trends as observed in theses correlations, notably the ferromagnetic interactions in the Mn10 and Mn19 complexes
Duñach-Clinet, Elisabet. "Application des complexes de métaux de transition en synthèse organique." Paris 11, 1985. http://www.theses.fr/1985PA112035.
Full textThe first part of the thesis presents the results pf the [2π + 2π + 2π] CpCo (CO)₂ mediated cycloadditions of unsaturated molecules to yield tensed tricyclic compounds, with a structural study (20 NMR) of the obtained rear ranged complexes. The cyclisation method is applied to the total synthesis of (+)-estradiol. The second part of the thesis develops the asymmetric oxidation of prochiral sulfides into sulfoxides by a hydrated chiral titanium (IV) complex bearing diethyl tartrate ligands. Alkyl aryl, dialkyl and several functionalized sulfoxides are obtained with 60-90 % enantiomeric excess. The application of a new chiral shift reagent for sulfoxides and phosphine oxides in ¹H NMR is described
Ruiz, Guerrero Maria del Rosario. "Polymérisation radicalaire contrôlée à base de complexes de métaux de transition." Lyon 1, 2003. http://www.theses.fr/2003LYO10046.
Full textSaillard, Benjamin. "Polymérisation de l'éthylène catalysée par des complexes activés de métaux de transition." Lyon 1, 2005. http://www.theses.fr/2005LYO10282.
Full textEyele-Mezui, Séraphin. "Complexes de métaux de transition organisés dans des nanostructures lamellaires hybrides fonctionnelles." Strasbourg, 2011. https://publication-theses.unistra.fr/public/theses_doctorat/2011/EYELE_MEZUI_Seraphin_2011.pdf.
Full textThis PhD work allowed to elaborate new multifunctionnal inorganic/organic hybrid materials. We showed that it was possible to functionalize the interlayer space of Layered Simple Hydroxides by transition metal complexes (phthalocyanine complexes, Schiff bas complexes and ruthenium polypyridine complexes) via an anionic exchange mechanism. We thus developed a new synthetic procedure, called “indirect synthesis”. We have succeeded to overcome the numerous difficulties linked to the insertion grafting of coordination complexes. The insertion of such complexes allowed to precise the mechanism of the magnetic ordering of theses hybrid materials. The insertion of copper phthalocyanine allows to benefit from an internal paramagnetic probe in-between the inorganic layers, and thus to evaluate the internal field resulting from the magnetic ordering of the material. Finally, with this approach, we have been able to obtain new functional magnets, combining magnetism and chirality, or magnetism and luminescence
Sortais, Jean-Baptiste. "Complexes cycloruthénés : Des complexes aux catalyseurs énantiosélectifs." Université Louis Pasteur (Strasbourg) (1971-2008), 2007. https://publication-theses.unistra.fr/public/theses_doctorat/2007/SORTAIS_Jean-Baptiste_2007.pdf.
Full textThe cyclometalation of chiral and achiral primary and secondary amines occurred readily with [(η6-C6H6)RuCl2]2 in acetonitrile. Good yields of the expected cationic products in which the phenyl group was ortho¬metalated were obtained. Benzylamine, (R)-1-phenylethylamine, (R)-1-(1-naphthyl)ethylamine, (R)-1-aminotetraline, bis(R)-phenylethylamine, bis-(R)-1-naphthylethylamine and (2R,5R)-2,5-diphenylpyrrolidine afforded the cycloruthenated products, whose general formula is [(η6-benzene)Ru(N-C)NCMe]PF6, where N-C represents the orthometalated ligands. Substitution of the acetonitrile ligand by PMe2Ph occurred readily on the ruthenium complexes. Accurate analyses of the structure of the complexes were implemented by 2D NMR in solution and by X-ray diffraction of single crystals in the solid state. The S configuration at the metal was usually associated with a δ conformation of the metallacycle, and conversely, the R configuration with the λ conformation. Ruthenacycles obtained by cyclometalation of enantiopure aromatic primary or secondary amines are efficient catalysts for asymmetric transfer hydrogenation (TOF up to 30 000 h¬1, TON up to 30 000). Enantioselectivities in the transfer hydrogenation of acetophenone ranged from 38% to 89% and from 33% to 98% for isobutyrophenone. It is possible to prepare the catalysts in situ, which allows the use of high-throughput experimentation. These complexes are also catalysts for Michael addition of aza- and carbonucleophiles upon prochiral enones. A mechanistic study of the asymmetric reduction of ketones was performed. We have isolated a dinuclear complex of ruthenium with an unsupported linear bridging hydride ligand which spontaneously isomerizes in a stable μ-H complex bearing a bent Ru-H-Ru bond. These compounds are stabilized intermediates of the reaction. Actives species were observed, but not isolated. The transfer hydrogenation catalyzed by cycloruthenated complexes proceeds through the metal-ligand bifunctional mechanism
Oueslati, Farhana. "Synthèse d'azocalixarènes bihétérocycliques : propriétés de complexation et d'extraction de métaux." Lyon 1, 2003. http://www.theses.fr/2003LYO10021.
Full textDurand, Jérôme. "Complexes hétérobimétalliques Fe-Pd pour des réactions de couplage et d'insertion." Université Louis Pasteur (Strasbourg) (1971-2008), 2001. http://www.theses.fr/2001STR13109.
Full textLutsen, Laurent. "Polycarbosilanes fonctionnels précurseurs de céramiques. Activation par des complexes de métaux de transition." Montpellier 2, 1994. http://www.theses.fr/1994MON20198.
Full textGarcia, Abeledo Maria-Leonor. "Synthèse de ligands formant des complexes peu solubles avec les métaux de transition." Doctoral thesis, Universite Libre de Bruxelles, 1988. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/213337.
Full textZhang, Shuanming. "Synthesis and reactivity of polyfunctional phosphorus ligands and their transition metal complexes." Strasbourg, 2011. http://www.theses.fr/2011STRA6024.
Full textThe synthesis of P,N chelating ligands and their transition metals complexes has become increasingly attractive in the last few years owing to their intrinsic structural properties and broad applications. Such heterofunctional ligands possess a hard nitrogen donor with a soft phosphorus donor leading to considerable chemical and structural diversity and may generate hemilabile systems endowed with enhanced reactivity. 1k, 1m We are particularly interested in thiazoline- and oxazoline-based phosphine systems, which are often active in catalytic ethylene oligomerisation. We are also interested in Pt(II) complexes derived from P,P functional ligands derived from Ph2PCH2PPh2 (dppm), which exhibit interesting luminescence properties
Cardinali, François. "Synthèse de nouveaux dérivés du C60 et de complexes de métaux de transition à bande de transfert de charge." Université Louis Pasteur (Strasbourg) (1971-2008), 2005. https://publication-theses.unistra.fr/public/theses_doctorat/2005/CARDINALI_Francois_2005.pdf.
Full textThe current manuscript presents the synthesis of new C60 derivatives bearing transition metal complexes. The discovery of C60 in 1985, followed by that of the other fullerenes, renewed the interest of the scientific community for the chemistry of the carbon element. C60, the most abundant fullerene, has the shape of a football. After its synthesis was realised on the scale of one gram, in 1990, its properties were studied. It proved to be an excellent electron and/or energy acceptor. Therefore, the synthesis and the electronic properties of fullerene-donor systems have been largely investigated on the last decade. We thus synthesised covalent C60 derivatives bearing transition metal complexes, which are known to be electron donors. Photophysical studies proved the presence of electron transfer deactivation pathways in our systems. We also developed a supramolecular approach associating C60 with an oligophenylenevinylene (OPV) donor through non-covalent bonds, in our case H-bonds between two C60-ammonium derivatives and an 18-O-6 crown-ether bearing an OPV. A cooperative effect was evidenced through complexation studies, due to fullerene-fullerene interactions
Cheisson, Thibault. "Synthèse et réactivité de complexes à ligand iminophosphorane : des métaux de transition aux actinides." Palaiseau, Ecole polytechnique, 2015. https://theses.hal.science/tel-01245256/document.
Full textGajda, Tamas Pal. "Équilibres et structure des complexes de métaux de transition avec des peptidoamines contenant l'histamine." Nancy 1, 1993. http://www.theses.fr/1993NAN10141.
Full textDeunf, Elise. "Préparation, Caractérisation et Activation Electrochimique de Nouveaux Complexes Métallo-Cyclodextrines." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2010. http://tel.archives-ouvertes.fr/tel-00814773.
Full textChiboub, Fellah Fatima Zohra. "Synthèse et détermination structurale de complexes de métaux de transition et d'entités 3d-4f." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/288/.
Full textThis work is concerned with the synthesis, structural determination by single crystal X-ray diffraction and study of the magnetic properties of polynuclear copper complexes, alkaline-earth/copper complexes and 3d/4f complexes. In the first chapter, the synthesis of half-unit complexes and half-unit ligands is described as well as the various strategies used for obtaining non-symmetrical Schiff base copper and nickel complexes. The synthesis and study of the structural and magnetic properties of two series of polynuclear copper compounds resulting from the association of half-unit complexes is the topic of the second part of this work. The effect of the chemical nature of the ortho-substituent to the O(phenoxo) donor and the effect of the type of diamine on the nuclearity of these complexes has been elucidated. In the third part, we describe how the compartmental Schiff bases having an inner N2O2 coordination site and a larger O4 coordination site resulting from the reaction of the metallo-ligand with the alkaline-earth salts allowed isolating a series of 3d/alkaline-earth/salicylaldimine complexes with different 3d/alkaline-earth ratios. In the last part, we describe the preparation of di-, tri- and tetra-nuclear 3d/4f complexes. The assembling ligands are non-symmetrical Schiff bases bringing different bridges. The study of their magnetic properties contributes to a better understanding of the factors responsible for the nature and intensity of magnetic interactions. An SMM type of behaviour is likely for the tetranuclear Cu-Tb-Tb-Cu complex, suggesting that the presence of a Tb-Tb interaction does not exclude an SMM behaviour
Frostin, Maryvonne. "Oxydation de phénols par l'oxygène moléculaire catalysée par des complexes de métaux de transition." Paris 11, 1985. http://www.theses.fr/1985PA112202.
Full textPolymeric Schiff bases derived from salicylaldehyde and their cobalt (II) and copper (II) complexes have been synthetized. Depending on the polymer used, soluble and insoluble complexes can be obtained which are tetradentate (MpolySalpn) or pentadentate (MpolySaldpt). These complexes have been used to catalyze the oxidation of phenols by molecular oxygen and their activity has been compared to the corresponding monomeric MSalen and Msaldpt. Manganese (II) / porphyrins and cobaloximes were shown also to catalyze the oxidation of the same phenols. Cobalt complexes selectively promote the conversion of phenols to quinones whereas with manganese porphyrins, oxidative coupling is the preferred reaction. Monomeric complexes are more active than polymeric ones, which however are more resistant to oxidative degradation. The mechanism of the oxidation of 2,4,6-tri-terbutyl phenol by cobalt has been investigated. The cobalt complex forms a superocomplex with O2 which oxidises the phenols to phenoxy radicals. The latter react with the superoxo complex to give a cobalt (III) peroxydic complex which is then hydrolyzed to the corresponding hydroperoxyde. This one is decomposed by the catalyst to the final oxidation coupling are produced directly from the phenoxy radicals
Huille, Sylvain. "Synthèse et réactivité thermique de polycarbosilanes fonctionnels et complexes à des métaux de transition." Montpellier 2, 1993. http://www.theses.fr/1993MON20086.
Full textPrandi, Jacques. "Réarrangement, synthèse et synthèse asymétrique d'époxydes catalysés par des complexes de métaux de transition." Paris 11, 1986. http://www.theses.fr/1986PA112217.
Full textThe thesis deals with new applications of transition metal complexes to organic synthesis. The selective rearrangement of terminal epoxides to methyl ketones is promoted by some manganese and cobalt compounds in good chemical yield. A mechanistic study emphasizes the basic requirements for catalytic activity. The second part reports the device and investigation of a new and efficient catalytic epoxidation system using 30% aqueous hydrogen peroxide. The catalyst, association of a pertungstate dinuclear anion with a phosphonium (or ammonium) salt, nicely epoxidizes a wide variety of olefins in high chemical yields in a biphasic solvent system. Allylic alcohols and unsaturated acids are also reactive. High selectivities are observed and the synthetic usefulness of the process is clearly demonstrated. The third part of this work is concerned with asymmetric epoxidation of isolated double bonds or allylic alcohols with chiral vanadium and tungsten complexes. Enantiomeric excesses ore still low but suggestions are made for their improvement
Zapata, Laurence. "Approche d'une méthode de cyclisation d'oligonucléotides par l'intermédiaire de complexes des métaux de transition." Toulouse 3, 2002. http://www.theses.fr/2002TOU30069.
Full textMoreno, Beatriz. "Complexes électrophiles et complexes dihydrogènes du ruthénium dans un environnement azoté." Toulouse 3, 1995. http://www.theses.fr/1995TOU30029.
Full textFeuvrie, Christophe. "Complexes métallo-organiques de métaux de transition et de terres rares pour l'optique non linéaire." Rennes 1, 2005. http://www.theses.fr/2005REN1S040.
Full textHeck, Romain. "Synthèse et étude des propriétés physico-chimiques de nouvelles métallo-cyclodextrines." Nancy 1, 2003. http://www.theses.fr/2003NAN10165.
Full textThis work deals with two aspects of the study of new Metallocyclodextrins. First of all, the "phosphine-imide" reaction was generalised to the synthesis of a new family of multichromophoric and multicomplexant supramolecular podands : URFT urei͏̈docyclodextrins (URFT = Upper Rim Fully Tethered) and URFT thiourei͏̈docyclodextrins. Moreover, a new fast and reproducible synthesis of symmetrically trifunctionnalised a-cyclodextrin was developed. Second of all, specific physicochemical properties related to selective metal coordination and complexation and to fluorescence properties of URFT urei͏̈docyclodextrins "rare earth" complexes were investigated. The new systems were found to have very selective and original coordination processes towards transition metals cations. "Rare earth" complexes fluorescence emission was found to be highly sensitive towards the presence of transition metals cations and small organic molecules
François, Marc. "Electrosynthèse préparative d'acides carboxyliques à partir d'halogénures organiques et de dioxyde de carbone, catalysée par des complexes de métaux de transition." Paris 13, 1986. http://www.theses.fr/1986PA132011.
Full textZarhloul, Redouane. "Halogéno complexes du ruthénium : les complexes halogéno-nitrosyl, formation en solution aqueuse- structures-extraction." Lyon 1, 1991. http://www.theses.fr/1991LYO10170.
Full textHeuclin, Hadrien. "Les dianions géminés comme précurseurs pour la synthèse de complexes carbéniques de métaux de transition." Phd thesis, Ecole Polytechnique X, 2012. http://pastel.archives-ouvertes.fr/pastel-00761254.
Full textBourdon, Cyrille. "Synthèse et étude de complexes propylsulfanylcyclopentadienyliques des métaux de transition des groupes 4 et 8." Dijon, 1996. http://www.theses.fr/1996DIJOS036.
Full textDasna, I. Wayan. "Complexes polymériques de métaux de transition à ligands nitronyl et polycyanures : synthèse, structure et magnétisme." Rennes 1, 2001. http://www.theses.fr/2001REN10065.
Full textRaboin, Jean-Christophe. "Complexes de métaux de transition pour la photosensibilisation de semi-conducteurs à large bande interdite." Metz, 1999. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1999/Raboin.Jean_Christophe.SMZ9940.pdf.
Full textEtoc, Ariane. "Synthèse de complexes de métaux de transition optiquement purs et étude photophysique en présence d'ADN." Doctoral thesis, Universite Libre de Bruxelles, 2003. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211307.
Full textBoucher, Aude-Claire. "Recherche de catalyseurs peu sensibles à la présence de monoxyde de carbone pour piles à combustible PEMFC alimentées en gaz de reformage." Poitiers, 2002. http://www.theses.fr/2002POIT2291.
Full textThe aim of this work was to prepare and to characterize platinum-based bimetallic catalyst before testing their electrocatalytic activities, as fuel cell anode, in presence of some ppm of carbon monoxide. In order to avoid platinum poisoning, another metal such as tin is added. This process results in a material more tolerant to CO. A supported Pt-Sn catalyst was prepared by a chemical route, using a platinum carbonyl complex. This material was characterized by physical and chemical methods which indicate that it is constituted of nanostructured Pt3Sn particles. These particles have a narrow distribution size with a mean diameter of approximately 2 nm. Its activity towards CO, particularly in fuel cell conditions, was compared with an analogue commercial catalyst. This electrochemical study shows that the catalyst prepared from the carbonyl precursor is less sensitive to CO than the commercial one
Cuevas-Chávez, Cynthia. "Synthèse, structure et réactivité de complexes de platine et d'iridium à ligands phosphinodi(benzylsilanes)." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30196.
Full textThe rich chemistry and applicability in such a wide range of fields (e.g. small molecule activation, selective transformations including catalytic developments, etc.) of silicon based pincer-like compounds with transition metals has been witnessed by the remarkable advances in coordination chemistry as well as in organometallics. This is due to the outstanding properties of Si atoms which generate electron rich metal centres concomitantly labilizing trans substituents. However, despite all the plethora of arrangements of such species throughout the literature (e.g. framework, number and nature of anchoring points), metal derivatives with polydentate ligands incorporating two silicon atoms are limited as is the study of their reactivity. Therefore, this thesis presents the synthesis, structure and reactivity of novel Platinum and Iridium complexes supported by the "SiPSi" pincer-type ligand. Interestingly, the square-planar PtII complex of formula trans-[(SiPSi)Pt(PPh3)] (SiPSi = P(o-C6H4CH2SiMe2)2Ph) reversibly reacts with small molecules, H2 and CO, forming the corresponding dihydride and dicarbonyl 18-electron species, respectively. On the other hand, the dimeric complex [Ir(SiPSi)(µ-Cl)]2 dissociates in benzene solution to yield the 14-electron monomeric species [Ir(SiPSi)Cl] which readily reacts with two electron donors. 16- and 18-electron configurations are obtained depending mainly on sterics in the case of P-derivatives. Different dispositions of L ligands on 18-electron species (L = CNCD3, CO) and isomerisation processes were also evidenced. Moreover, even if iridium is prone to perform oxidative additions, we also showed that Si-H agostic bonding can favour C-H activation of an adjacent acidic methylene group leading to a tetradentate ligation
Pelinski, Lydie. "Régiospécificité et induction asymétrique en série arène chrome tricarbonyle : préparation diastéréosélective d'alcools benzyliques complexes." Lille 1, 1988. http://www.theses.fr/1988LIL10034.
Full textMesfar, Khalid. "Elaboration et caractérisation électrochimique de complexes de métaux de transition immobilisés sur un support organique (polymère) ou un support minéral (zéolithe)." Tours, 1994. http://www.theses.fr/1994TOUR4002.
Full textLoison, Johan. "Nouveau catalyseurs pour application dans le domaine de l'énergie : hybride g-CN/ions métalliques." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALV018.
Full textGaphitic carbon nitride (gCN) is an organic semi-conductor which has lately attracted a lot of attention when its photocatalytic properties were highlighted for water splitting. It has been recently shown that the catalytic activity could be increase through metallic doping. However, the polymer's structure is not well known. Its poor solubility prevent the use of usual characterization techniques and the term gCN includes a range of different compound, depending of the experimental conditions. The position of the metallic cation, its oxydation state and the interactions between the metal and the polymère are unknown. The determination of these interaction and the ability of the monomers (heptazines) to form inorganic complexes could help optimising/doping the material. This is the aim of the work presented in this manuscript. Heptazine based ligands have been developed and studied. The ability to coordinate transition metals have been studied and spectroscopic and electrochemical studies liked with DFT calculations helped to define the metal/ligand interactions. Generally, heptazines can be compared as soft bases and they behave as π-acceptor ligands. In parallel, it has been shown that heptazines have the ability to fonctionalize high specific surface area materials, such as graphene
Hervé, Aubert Katel. "Matériaux moléculaires conducteurs et magnétiques à base de complexes de métaux de transition : synthèse et caractériqations." Rennes 1, 2005. http://www.theses.fr/2005REN1S071.
Full textDufour, Pascal. "Les métaux de transition des groupes 4, 8 et 9 dans la chimie des siloles et des germoles : synthèse et réactivité de nouveaux métalloles et de leurs complexes." Toulouse 3, 1990. http://www.theses.fr/1990TOU30052.
Full textHusson, Jérôme. "Synthèse et étude de complexes de métaux de transition pour de nouveaux matériaux à applications photovoltaïques." Metz, 2004. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2004/Husson.Jerome.SMZ0406.pdf.
Full textTerpyridine ligands are prepared. These ligands are functionalised at position 4' either by heterocycles such as furan, thiophene and pyrrole, or by a carboxylic acid (or a precursor). To prepare these compounds, a new method using alumina as a base without solvent is used. These ligands are used in the preparation of ruthenium (II) complexes. Two kinds of complexes are prepared : homoleptic complexes in which both ligands are functionalised by an heterocycle, and heteroleptic ones in which one ligand is functionalised by an heterocycle, and the other one by carboxylic acid function. For the latter, a new access is presented. It is based on the oxidation of a furan ring into a carboxylic acid, directly on the complex. Photo-physical and electrochemical properties of these complexes are studied. These complexes are also used in preparation of new materials. Homeleptic ones allow preparation of oligomers containing metallic centres by electro-polymerisation. Heteroleptic ones are used in the preparation of modified electrodes by covalent bonding with the carboxylic acid function
Cariou, Kevin. "Nouvelles synthèses d'hétérocycles catalysées par des complexes de métaux de transition et des acides de Brønsted." Paris 6, 2006. http://www.theses.fr/2006PA066345.
Full textAl, Cheikh Joumada. "Étude électrochimique de complexes moléculaires à base de métaux de transition non-précieux pour applications énergétiques." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS038/document.
Full textElectrochemistry is becoming a major field in new energy storage and conversion technologies. Nowadays, the hydrogen evolution reaction (HER) is a reaction of great societal interest, which is at the heart of new technologies enabling the development of systems for the conversion of energy. However, some issues related to the use of noble metals (platinum, in particular) as catalysts have not been solved yet. This thesis is part of the scientific approach of the Research and Innovation in Electrochemistry for Energy (ERIEE) research group which has been interested for several years in the substitution of these noble metals by the use of transition metal based electro-catalysts. These molecules consist of organic compounds containing transition metals as an electro-active center for application in industrial electrolysers. This thesis focuses on the study of a family of molecular complexes based on transition metals (Co or Fe), the so-called clathrochelates, characterized by different chemical structures. The choice of the ligands constituting these complexes as well as the study of their functionalization processes on ad hoc substrates, constitute key elements in the apprehension of the resulting electro-catalytic performances.These electro-catalysts were studied both in solution (homogeneous phase) and functionalized at the surface of solid electrodes. Their physico-chemical properties as well as their electrocatalytic turnover for the hydrogen evolution reaction, have been systematically characterized.In particular, scanning electrochemical microscopy (SECM) allowed for the characterization of the electrocatalytic properties of modified electrodes at the local scale
Petit, Sarah. "Élaboration de nouveaux complexes de coordination d'éléments de transition d et f : synthèses, structures, propriétés magnétiques et optiques." Lyon 1, 2007. http://tel.archives-ouvertes.fr/docs/00/26/46/60/PDF/These_Sarah_PETIT_couleur_CCSD.pdf.
Full textCoordination chemistry of transition metals gives an access to numerous molecular magnetic materials that exhibit varied properties. During this work, several ligands with intrinsic properties have been chosen and their chemistry has been developed in order to get specific magnetic behavior. Solvothermal syntheses allowed the characterization of several complexes based on macrocycles. Two dinuclear CoII and FeIII complexes were isolated. Their molecular structures are built from metal ions located like in a "sandwich" between two calixarenes units. These complexes considered as molecular starting blocks were used for the synthesis of clusters with higher nuclearity. An original complex associating six CoII ions has been then isolated. The complexation of Schiff base ligands resulting from the condensation of the acetylacetone with various amino acids has been performed. From one of these original ligands, an almost perfect triangular trinuclear CuII complex has been then isolated and fully characterized. Ab initio calculations have been carried out in order to explain its magnetic properties. Finally, the complexation of β-diketone based ligands with various metals was explored. It has been then possible to control the nuclearity of molecular buildings block. The use of a preformed brick (cubane type) gave an access to a heptanuclear NiII complex. This latter presents the characteristics of a single molecule magnet. The last stage of these researches was to modify the steric effect of these β-diketone ligands in order to control the final cluster size. Three families of polynuclear 4f complexes (Ln5, Ln8 and Ln9) were obtained. Structural, magnetic studies and detailed analysis of the spectroscopic characteristics of these europium(III) complexes were achieved. A completely original work has been carried out on Y9 clusters doped with Eu (Y9-xEux) by linking molecular structures with luminescence properties
Sénéchal-David, Katell. "Complexes de lanthanides pour l'optique non linéaire et la luminescence." Rennes 1, 2003. http://www.theses.fr/2003REN10059.
Full textCabrera, Armando. "Génération électrochimique de complexes du cobalt : applications en catalyse homogène." Lille 1, 1986. http://www.theses.fr/1986LIL10128.
Full textMaldivi, Pascale. "Complexes binucléaires de métaux de transition avec les acides gras : synthèses, obtention de mésophases thermotropes, études physico-chimiques et structurales." Grenoble 1, 1989. http://www.theses.fr/1989GRE10114.
Full textMuchow, Günter. "Réactions de substitution nucléophile et d'élimination sur un substrat prochiral bicyclique diacétate allylique, catalysées par des complexes au palladium." Aix-Marseille 3, 1992. http://www.theses.fr/1992AIX3A012.
Full textLepeltier, Marc. "Nouveaux complexes de l'iridium(III) à ligands cyclométallés fonctionnels : synthèse et propriétés photophysiques." Rennes 1, 2005. http://www.theses.fr/2005REN1S143.
Full textCoutelier, Olivier. "Synthèse de nouveaux complexes de tungstène : application à la métathèse d'alcynes terminaux." Lille 1, 2005. https://ori-nuxeo.univ-lille1.fr/nuxeo/site/esupversions/8541b04c-19ea-4546-aef6-f89031e7be75.
Full textPerochon, Romain. "Complexes dithiolène neutres et paramagnétiques, discotiques, chiraux ou mixtes." Rennes 1, 2009. http://www.theses.fr/2009REN1S103.
Full textThis work describes the synthesis of novel gold dithiolene complexes, neutral and paramagnetic, together with the investigation of their physicochemical properties. Discotic dithiolene complexes were prepared with ligands incorporating alkoxybenzil and bis-alkoxybenzil. They are characterized by a NIR absorption band up to 1,6 nm and a strong delocalization on the dithiolene ligand. The complex with bis-alkoxybenzil substituants shows a hexagonal collumnar mesophase, invistigated by X-ray diffraction. Chiral and paramagnetic gold dithiolene complexes, were prepared from camphorquinone. The limited differences of magnetic behavior are analyzed, between the diastereoisomeric mixture and the enantiopure complex. Investigation of mixed dithiolene complexes associating the properties of two different dithiolene ligand (overlap interactions, thermotropism, chirality) has led to the isolation of the very first mixed dithiolene gold complex
Riegel, Nadège. "Synthèse de complexes de métaux de transition à partir des phosphines borane : application en catalyse homogène supportée sur polypyrrole." Cergy-Pontoise, 1997. http://www.theses.fr/1997CERG0023.
Full text