WorldCat Identities

Taton, Daniel (1968-....; chimie des matériaux)

Overview
Works: 45 works in 48 publications in 2 languages and 50 library holdings
Roles: Other, Thesis advisor, Opponent, Author
Publication Timeline
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Most widely held works by Daniel Taton
POLYMERES FONCTIONNELS DERIVES DU GLYCIDOL. APPLICATION A LA SYNTHESE DE POLYETHERS CRISTAUX LIQUIDES by Daniel Taton( Book )

2 editions published in 1994 in French and held by 4 WorldCat member libraries worldwide

L'OBJET DE LA THESE EST LA PREPARATION DE POLYETHERS FONCTIONNELS DERIVES DU 2-3 EPOXYALCOOL (GLYCIDOL). LE TRAVAIL SE COMPOSE DE DEUX PARTIES. LA PREMIERE PARTIE DECRIT LA SYNTHESE DE POLYGLYCIDOLS RACEMIQUES ET OPTIQUEMENT ACTIFS. L'OBJECTIF A ETE D'OBTENIR DE HAUTS POLYMERES DE STRUCTURE REGULIERE PAR POLYMERISATION ANIONIQUE. A CET EFFET, IL EST NECESSAIRE DE PROTEGER LA FONCTION HYDROXYLE DU MONOMERE AVANT SA POLYMERISATION. NOUS AVONS UTILISE L'ETHER ETHYL VINYLIQUE (EEV) POUR LA REACTION DE PROTECTION ET CE GROUPEMENT PROTECTEUR S'EST AVERE STABLE DANS LES CONDITIONS DE POLYMERISATION. APRES DEPROTECTION EN MILIEU ACIDE, DES POLYGLYCIDOLS POSSEDANT LES CARACTERISTIQUES RECHERCHEES ONT ETE OBTENUS. CES POLYMERES PRESENTENT DE NOMBREUX INTERETS EN VUE D'APPLICATIONS (PAR EXEMPLE DANS LE DOMAINE DES BIOMATERIAUX), DU FAIT DE LEUR HYDROSOLUBILITE ET DE LA POSSIBILITE DE MODIFIER LES FONCTIONS HYDROXYLES LATERALES PAR DES GROUPEMENTS A PROPRIETES SPECIFIQUES. DES COPOLYMERES DU GLYCIDOL ET DE L'OXYDE D'ETHYLENE, AINSI QUE DES POLYTHIOGLYCIDOLS, ONT EGALEMENT ETE PREPARES. LA DEUXIEME PARTIE DE LA THESE CONCERNE LA SYNTHESE DE POLYETHERS CRISTAUX LIQUIDES A CHAINES LATERALES MESOGENE PAR POLYMERISATION D'OXIRANES PORTEURS D'UN GROUPE CYANO OU METHOXYBIPHENYLE DERIVES DU GLYCIDOL. NOUS AVONS ETUDIE LA RELATION ENTRE LA STRUCTURE ET LES PROPRIETES DES POLYMERES EN EXAMINANT PLUS PARTICULIEREMENT L'INFLUENCE DE PARAMETRES TELS QUE LA TACTICITE ET LA CHIRALITE DE LA CHAINE POLYETHER, LA MASSE SOLAIRE ET LA LONGUEUR DU GROUPE ESPACEUR. DANS LE CAS DES POLYMERES COMPORTANT UN ESPACEUR TRES COURT, NOUS AVONS OBSERVE UN TRANSFERT DE LA CHIRALITE VERS LA MESOPHASE AVEC OBTENTION D'UN PRODUIT CHOLESTERIQUE ALORS QU'AVEC UN ESPACEUR PLUS LONG, UN TEL TRANSFERT N'A PAS ETE MIS EN EVIDENCE
Synthèse et auto-assemblage de copolymères amphiphiles en étoile de type "miktoarm" by Jérôme Babin( Book )

2 editions published in 2006 in French and held by 2 WorldCat member libraries worldwide

L'objectif de ce travail est l'étude de l'influence de l'architecture des copolymères à blocs sur les propriétés d'auto-assemblage en solution et en masse. Dans un premier temps, de nouvelles étoiles miktoarm amphiphiles AB2 -à base d'un bloc A hydrophobe de polystyrène et de différents blocs B hydrophiles de poly(acide acrylique), de poly(acide glutamique) et de poly(oxyde d'éthylène)- ont été élaborées en utilisant une stratégie de synthèse originale, fondée sur la combinaison de méthodes de polymérisation " vivante/contrôlée " et de réactions de modification chimique des bouts de chaîne. Ensuite, nous avons comparé les comportements auto-associatifs en solution diluée des étoiles miktoarm amphiphiles PS-b-(PAA)2 et PS-b-(PGA)2 avec ceux des copolymères à blocs linéaires de même composition. Nous avons également étudié l'effet de deux stimuli externes sur le comportement des objets auto-assemblés : la force ionique de trois familles de copolymères à blocs : un système " flexible-flexible " PS-b-(PAA)n=1 ;2 et deux systèmes " rigide-flexible " PS-b-(PGA)n=1 ;2 et PS-b-(PBLG)n=1 ;2
Copolymères à blocs « hybrides » à base de xyloglucane et de polymère vinylique en combinant modification chimio-enzymatique et polymérisation radicalaire contrôlée by Jérôme Lohmann( Book )

2 editions published in 2009 in French and held by 2 WorldCat member libraries worldwide

Xyloglucan from tamarind seeds (XG) is a natural occurring polysaccharide. The association of the xyloglucan with a vinylic polymer part in an “hybrid” natural/synthetic block copolymer architecture gives the possibility to take advantages of its self-assembly in aqueous solution. We propose in this manuscript two synthetic strategies giving rise to “hybrid” block copolymers, based on chemo-enzymatic modification of xyloglucan oligosaccharides and controlled radical polymerization MADIX of vinylic monomers: acrylamide (Am), vinyl acetate (AcV), N-vinyl-2-pyrrolidone (NVP). The “starting from” strategy consists in MADIX controlled radical polymerization of a vinylic monomer starting from a modified oligosaccharide bearing one/two polymerizable group(s). The “coupling onto” strategy consists in a coupling by “click chemistry” between vinylic polymer obtained by controlled radical polymerization of a chain transfer agent bearing an azide function and a modified oligosaccharide bearing an alkyne function. Four families of “hybrid” block copolymers were thus obtained (XG-b-PAm, PAm-b-XG-b-PAm, XG-b-PAcV, XG-b-PNVP). A previous physic-chemical study in solution of these copolymers has also been achieved suggesting the formation of polymersomes
Synthesis of -dye-labelled thermoresponsive block copolymers by raft polymerization : behaviour at the air-water interface and in aqueous solutions by Mariana Beija( )

1 edition published in 2009 in English and held by 1 WorldCat member library worldwide

Les copolymères à blocs di-hydrophiles contenant un bloc thermosensible reçoivent une attention croissante grâce à leur capacité d'auto-organisation en micelles induite par une variation de température. Néanmoins, peu de travaux ont été consacrés à l'étude de leur conformation par fluorescence et de leur dynamique à l'interface air-eau et en solution aqueuse. Dans ce travail, des copolymères à blocs composés d'un bloc thermosensible deN,N-diéthylacrylamide (DEA) et d'un bloc hydrophile de N,N-diméthylacrylamide (DMA) ou d'un bloc réactif [copolymère statistique de DMA et de N-acryloxysuccinimide (NAS)] ont été synthétisés par polymérisation RAFT. Ces copolymères à blocs ont été fonctionnalisés à leur extrémité hydrophile par un chromophore, Rhodamine B ou Vert de Malachite, via une stratégie de pré- ou de postpolymérisation. Dans le premier cas, des dérivés aminés de Rhodamine B et Vert de Malachite ont été synthétisés pour l'élaboration d'agents de transfert de chaîne (ATC) marqués, ce qui permet directement l'obtention de copolymères à blocs alpha-fonctionnalisés par un chromophore. En parallèle, des copolymères à blocs ont été préparés via l'utilisation d'un ATC précurseur puis fonctionnalisés ultérieurement par les dérivés aminés des chromophores. Le comportement thermosensible de ces polymères et d'un copolymère à blocs amphiphile de DEA et de N-décylacrylamide a été étudié à l'interface air-eau et en films de Langmuir-Blodgett par AFM et microscopie confocale de fluorescence. Des études d'émission et d'anisotropie de fluorescence, de diffusion de lumière et de RMN 1H ont été réalisées pour étudier leur comportement en solution aqueuse
Acquisition de données en conditions non-conventionnelles par l'utilisation de gouttes comme microréacteurs de polymérisation dans un réseau millifluidique by Nicolas Lorber( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

The aim of this thesis work is the development of a miniaturized droplet-based millifluidic tool which allows to safely synthesize and investigate polymerization reactions in harsh or “extreme” conditions.For this purpose, the polymerization reactor was reduced to the size of a droplet of a few microliters. At this scale, the droplet microreactor has a surface to volume ratio higher than those commonly obtained with conventional batch reactors (~1500 compare to 10). This important surface allows efficient heat transfer between the internal medium of the droplet (where the chemical reaction takes place) and the external one, which is chemically inert. Here, in contrast to single-phase flows, other key characteristics to a miniaturized droplet-based approach consist in: (1) droplets can manage high internal viscosity issues without plugging the channel and (2) dispersion due to convection and diffusion is eliminated because the reactants are compartmentalized within droplets. Since all droplets move at the same speed, they do not coalesce and there is no residence time distribution. This is particularly important since viscosity in polymerization reactions can increase to thousand of centipoises or even higher in the case of gel processes.The use of droplets as batch microreactors flowing within a heated tube (1/8 in. o.d. and 1/16 in. i.d.) can allow investigating quickly and safely polymerization reactions at different conditions. We choose to use experimental conditions where fast and exothermic polymerization process occurs and/or viscosity can be an issue. Acrylic acid at low pH and high concentrations is hence a good candidate to obtain such behavior. Since droplet composition depends only on flow rates, it was easy to screen different experimental conditions, including those which could not be used in conventional batch reactors (i.e., high monomer concentrations and temperatures; 40% w/v and 90 °C).Moreover, coupled with appropriate and sensitive analytical systems, basic kinetic data can be obtained in line through the wall of the transparent tube. By using Raman spectrometry and the time-space equivalence which is specific to the use of droplet-based micro- and millifluidic devices, we were capable to monitor molar conversions and monomer concentrations as a function of time. Thus, we verified the 4/3 order kinetics in initial monomer concentration and a 1/2 dependence in initial initiator concentration. We also able measured the overall activation energy for the rate of polymerization between 68°C to 90°C.In conclusion, droplet-based millifluidics seems to be a promising high throughput screening approach for investigating kinetics and possibly tailoring polymer properties
Lewis-pair amine-borane polymers as hydrogen reservoirs : structure/reactivity relationship by Audrey Ledoux( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Le stockage et le relargage contrôlé du dihydrogène est devenu un domaine important de recherche visant à répondre à une demande énergétique grandissante. Bien que le borazane (NH3-BH3) ait été identifié comme un candidat de choix dû à sa grande capacité de stockage (16.9 wt.% H2), les chercheurs ont mis en évidence certaines limitations telles que des difficultés de mise en forme et des difficultés de régénération du matériau.Nous avons tenté de répondre à ces problématiques en concevant de nouveaux polymères contenant des fonctions de type amine-borane dans leur chaîne principale (polyboramines) et sur les chaînes latérales, afin d'étudier l'influence du squelette polymère sur les propriétés du matériau et sa réactivité associée. Nos objectifs ont visé une facilité de synthèse et de mise en forme mais aussi l'éventualité d'une régénération simple et directe du réservoir après relargage du dihydrogène. Nous avons synthétisé ces polymères en une étape quantitativement et sélectivement à partir de fragments commerciaux ou facilement accessibles. Nous avons observé une influence conséquente de la matrice polymère sur les paramètres cinétiques et thermodynamiques de la déshydrogénation, à la suite de quoi nous avons étudié les paramètres structuraux influençant la réactivité. De plus les polymères obtenus après déshydrogénation ont montré d'intéressantes propriétés mécaniques et chimiques. Ces résultats nous ont encouragés à nous pencher vers le recyclage de ces réservoirs à hydrogène
Fatty acids as a source of original aliphatic polycarbonate materials by Pierre-Luc Durand( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Fatty acids were derivatized with the objective to design bio-based aliphatic polycarbonate(APC) materials. To that purpose, two platforms of lipidic 6-membered cyclic carbonates were prepared following synthetic routes either involving the ring-closure of a malonate intermediate or the coupling reaction between a fatty acid and 2-amino-1,3-propanediol. The ring-openingpolymerization (ROP) of these cyclic carbonates was next investigated. The first platform of 6CCswas polymerized in the presence of Sn(Oct)2 as catalyst, yielding low Tg aliphatic polycarbonates ranging from -61°C to -26°C with respect to the size of the pendant aliphatic side chains. The polymerization of the second lipidic 6CC platform was performed in a controlled fashion using DBU/Schreiner thiourea as catalytic system. Taking advantage of the presence of unsaturation functions on the linear bio-based APCs, cross-linked polycarbonate materials were then prepared.Several cross-linking methods were tested such as the irreversible thiol-ene coupling, the thermoreversible Diels-Alder reaction and the photo-reversible [2+2] cyclo-addition reaction between two cinnamate moieties. Fatty acid-based cross-linked APCs were thus designed and characterized; the latter exhibit tunable physico-chemical properties as a function of the monomer structure and the cross-linking density
Vegetable oils as a platform for the design of sustainable and non-isocyanate thermoplastic polyurethanes. by Lise Maisonneuve( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

This thesis aims to synthesize more sustainable thermoplastic polyurethanes from vegetable oil derivatives. The first route that has been investigated is based on the well-known reaction between a diol and a diisocyanate. Then to avoid the use of diisocyanates, the route via the polyaddition of a bis cyclic carbonate and a diamine have been studied as well. For this purpose, bifunctional precursors such as diols, bis 5- and 6-membered cyclic carbonates and diamines have been prepared from sunflower oil derivative (methyl oleate) and castor oil derivatives (methyl undecenoate and sebacic acid) The thermo-mechanical properties of the PUs have been modulated by designing and selecting the chemical structure of the (fatty acid-based) monomers. The performed model reaction kinetics revealed the higher reactivity of the 6-membered cyclic carbonates compare to the 5-membered ones. Finally, the developed route to fatty acid-based diamines via dinitriles synthesis in mild conditions was really efficient and this route is really promising to develop a fatty acid based-diamines platform and fully bio-based poly(hydroxyurethane)s
Fonctionnalisation de polymères et applications dans les domaines de l'énergie, de la catalyse, de la cosmétique et de la santé by Vincent Morizur( )

1 edition published in 2014 in French and held by 1 WorldCat member library worldwide

Les polymères sont à l'heure actuelle étudiés dans de nombreux domaines comme la chimie, la biochimie, les nanotechnologies, l'électronique, la médecine ou encore les sciences des matériaux et trouvent des applications dans des domaines comme l'industrie automobile, la chimie fine. L'objectif de cette thèse est de réaliser la fonctionnalisation de polymères et de modifier les propriétés de ces matériaux afin d'envisager des nouvelles applications. Nous nous sommes intéressés à des polymères de la famille des poly(aryle éther) et plus particulièrement au poly(éther éther cétone) (PEEK). Ce polymère est connu pour ses propriétés mécaniques, thermiques, électriques ou encore pour sa résistance aux produits chimiques. Dans le premier chapitre, il est question de la fonctionnalisation des différents polymères de départ par des fonctions chlorures de sulfonyle, acides sulfoniques et sulfonamides. Le second chapitre est consacré à la synthèse et à l'étude électrochimique de nouveaux électrolytes polymériques et à de nouvelles membranes pour d'éventuelles applications dans le domaine des batteries au lithium et au sodium, ainsi que dans le domaine des piles à combustible. Dans un troisième chapitre, la préparation de nouveaux catalyseurs métalliques dérivés d'acides sulfoniques polymériques est discutée. Une étude de l'activité catalytique de ces différents catalyseurs a été réalisée sur la réaction d'acylation de Friedel-Crafts. Le quatrième chapitre est consacré à la préparation de nouveaux matériaux ayant des propriétés optiques intéressantes. Enfin dans un cinquième chapitre, la préparation et l'étude de nouveaux matériaux ayant des propriétés antibactériennes sont exposées
Utilisation de la polymérisation RAFT pour la synthèse de latex de poly(chlorure de vinylidène) (PVDC) sans tensioactif by Émilie Velasquez( )

1 edition published in 2014 in French and held by 1 WorldCat member library worldwide

Since poly(vinylidene chloride) (PVDC)-based copolymers present unique oxygen and water vapor barrier properties, they are a material of choice for pharmaceutical blisters and food packaging. PVDC-based latexes used in coating applications are generally stabilized by low molecular weight surfactants, which are prone to migration in the film after coating and cause material degradation. The main goal of our project is the synthesis of surfactant-free PVDC-based latexes by using hydrophilic macromolecular RAFT agents (macroRAFT). The latter plays the role of precursor of stabilizer and limits migration phenomena by being covalently bound to particles. In a first part, RAFT polymerization of VDC was studied in homogenous solution. Well-defined statistical and amphiphilic blocks copolymers based on PVDC were synthesized. Then, PVDC-based latexes were obtained by emulsion polymerization mediated by hydrophilic non-ionic and pH sensitive macroRAFT pre-formed in organic solvent. Those hydrophilic segments were chemically anchored to the particles. A fully water-based process was developed by synthesizing in water pH sensitive and permanently charged hydrophilic macroRAFT which were further used directly in emulsion polymerization without additional purification. Stable PVDC-based latexes exhibiting solids content of 40 % were obtained using a very small quantity of macroRAFT, fulfilling the industrial requirements. Drying of self-stabilized latexes led to transparent films which display only a slight whitening after water exposition contrary to the commercial film reference and better barrier properties
Design of original vegetable oil-based cyclic carbonates and amines towards Poly(HydroxyUrethane)s by Océane Lamarzelle( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Etude du greffage radicalaire de l'anhydride maléique sur le polyéthylène en milieu fondu et en présence de radicaux nitroxyle et/ou d'alcoxyamines by Denis Belekian( )

1 edition published in 2012 in French and held by 1 WorldCat member library worldwide

This work deals with melt grafting of maleic anhydride onto low density polyethylene using radical initiators which are able to abstract hydrogen from the polyolefin backbone. The use of a nitroxide radical as a termination reagent in presence of peroxide allowed to prevent the polyethylene crosslinking during the maleic anhydride grafting. Indeed, the polyethylene crosslinking is the main side reaction but the elimination of a small proportion of the reagents (monomer and nitroxide radical) through other side reactions seems to be unavoidable. The peroxide substitution by an alcoxyamine leaded to a higher grafted maleic anhydride rate for the same polyethylene rheological modification. Nevertheless, the thermal decomposition mechanism of the alcoxyamine which makes the grafting reaction possible is still uncertain
Développement de méthodes accélérées pour la synthèse de polymères et réseaux conducteurs ioniques à base 1,2,3-triazolium by Mona Obadia( )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

This PhD thesis tackles the development of monotopic (or single step) processes enabling the accelerated synthesis of ion conducting polymer materials. A bibliographic study on 1,2,3-triazolium-based poly(ionic liquid)s (TPILs) have demonstrated their unequaled structural and functional richness. However, their syntheses require several synthetic steps and the use of catalysts, solvents and polymerization mediators.A first part is devoted to the development of an accelerated synthetic approach enabling in a single step to access TPILs with broad structural variety without solvent nor catalyst. Indeed the chemical structure of the spacer, the counter-anion and the N-3 substituent of the 1,2,3-triazolium group can be readily tuned from a broad library of a-azide-?-alkyne monomers and alkylating agents.A second part is devoted to the extension of this original synthetic approach to the formation of a series of ion conducting polymer networks, thus demonstrating the flexibility of the process and the broad capacity in structural design. These networks possess the unique properties of vitrimer materials based on dynamic exchanges of the cross-linking points by transalkylation reactions of C-N bonds under strain and temperature. They can thus be reshaped and recycled without significant loss of their properties, which constitute the first example of functional vitrimer.The properties of these materials, as well as the rapidity, the versatility and the flexibility of their syntheses constitute a major breakthrough in the field of ion conducting polymer materials and their applications
Chemical modification of fluorinated electroactive polymers by Konstantinos Kallitsis( )

1 edition published in 2019 in English and held by 1 WorldCat member library worldwide

Organic electronics are a low cost alternative to silicon based electronics that nable the fabrication of flexible devices, broadening the scope of electronics beyond the limitations imposed by silicon. For organic electronics to find wider real world applications, three classes of materials have to be optimized. Those classes are conductors, semiconductors and insulators, which are the three building blocks for any electronic device. While organic conductors and semiconductors have attracted significant attention during the past 40 years, research in high dielectric constant and thus high performance insulators is lagging far behind. The class of organic insulating materials with the highest dielectric constant are the Fluorinated Electroactive Polymers (FEPs). FEPs can be categorized in two different groups with vastly different electronic properties. Those groups are the ferroelectrics and the relaxor-ferroelectrics. The ferroelectric polymers, with main representative the copolymer P(VDF-TrFE) find application in electronic devices such as sensors, actuators, non volatile memories and energy generators. On the other hand, relaxorferroelectric polymers, with main representative the P(VDF-TrFE-CTFE) terpolymer are high performance insulating materials and find application in electronics as dielectric layers, in devices such as capacitors, organic field effect transistors, flexible displays and electrocaloric cooling devices amongst others. Although the polymers mentioned above are compatible with a large variety of printing techniques, their limited compatibility with photolithography, which is the method of choice for large throughput electronics production limits their potential of realization. One of the main aims of this thesis was to alter the chemistry of such polymers, in a way that would make them directly compatible with photolithography, while maintaining their desirable electronic properties. To do so, a method allowing the introduction of additional functional groups on FEPs had to be developed. However, due to the excellent chemical stability of fluorinated polymers, developing such a method was a challenging task. The methods developed, use nucleophilic substitution to attach different functional groups on commercially available FEPs by leveraging the existence of groups prone to substitution on the polymer backbone, bypassing the innate chemical stability of such polymers. First, azido groups, known to cross-link upon irradiation with UV light were attached on relaxor ferroelectric P(VDF-TrFE-CTFE) terpolymers. The terpolymers bearing azido groups were directly used as negative photoresists in conventional photolithography process while maintaining a very high dielectric constant. Second, due to safety and stability issues, a more general approach was followed, consisting in grafting type II photoinitiators (based on aryl ketones) on the relaxorferroelectric P(VDF-TrFE-CTFE) and the ferroelectric P(VDF-TrFE) polymers. In those cases exceptionally stable polymers were obtained, with in some cases improved electroactive properties as compared to the pristine materials. These chemistries led us to an extraordinary case study, where FEPs bearing unsaturation were showing remarkable enchancement in electroactive properties. his very simple method of functionalizing FEPS paves the way to many more advances in the field
Synthèse de nouveaux acides de Lewis silylés pour la catalyse organique by Paul Ducos( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

In contrast with carbocations which existence was unambiguously proven in the early 60's, silylium ions (R3Si+) have remained for a long time elusive species and putative intermediates in many transformations involving organosilicon compounds. It was only in 2002 that the first structural proof (X-ray crystallography) dispelled any doubt about the existence of tricoordinated silicon cations in the condensed phase. Silylium ions are extremely electrophilic, able to coordinate to weak Lewis bases including solvent molecules such as benzene. The possibility to tame this acidity through an appropriate labile coordination even widens the scope of applications of these reactive species and allows their use as catalysts for organic synthesis. The aim of this thesis was to synthesize new stabilized silyliums ions and rationalize the impact of this stabilization onto the reactivity. In a first part, we focused on the use of hindered nitrogen derivatives to stabilize the silicon center. The nature and the strength of the interaction were assessed by NMR spectroscopy and theoretical calculations. In a second part, the introduction of chirality onto the silicon cation has been studied. A series of binaphtyl templated silyliums bearing an intramolecular Lewis base were synthesized. According to the strength of the stabilization, the chiral information present on the silicon can be persistent and used for asymmetric catalysis
Synthèses et applications catalytiques de nanoparticules d'élements de transition by Fangyu Fu( )

1 edition published in 2019 in English and held by 1 WorldCat member library worldwide

Catalysis is a key element in chemical synthesis, and current research is focusing on making catalytic processes cleaner in the context of green chemistry. In this spirit, this thesis involves the research of nanoparticle (NP) catalysts used in aqueous medium, without toxic ligand and in very small quantities toward a variety of useful processes. The synthesis of the catalytic NPs used cations of the transition elements of the right of the periodic table and of reducing agents capable of rapidly reducing these cations to atoms of zero oxidation state aggregating into small catalytically active metal NPs. The chosen reducing agents were organic (naphthyl sodium) or organometallic (19-electron) sandwich complexes of iron such as [Fe(I)Cp*(ŋ6-C6Me6)] or cobalt such as [Co(II)Cp*2], (Cp* = ŋ5-C5Me5)) used as electron reservoirs. The supports limiting the aggregation of the metal NPs were the solvent (polyethylene glycol, first part of the thesis), the cations of the organometallic electron reservoirs (2nd part of the thesis) or a zeolitic imidazolate framework (MOF of ZIF-8 type, 3rd part of the thesis). Instead of a metal cation, it has also been possible to use a cluster such as [Au25(SR) 18] (R = CH2CH2Ph) as a precursor, in which case the reduction was limited to a simple electron transfer producing an anionic cluster stabilized by the congested sandwich counter cation of the electron reservoir. The small NPs thus stabilized proved to be excellent "green" catalysts for several C-C or C-N reactions and hydrogen production by hydrolysis of metal hydrides in an aqueous medium under very mild conditions. This latter reaction was efficiently catalyzed by Ni2Pt@ZIF-8 bimetallic NPs with a spectacular synergy between the two metals
Nouvelles méthodes de génération de radicaux silylés : application à des processus radicalaires sans étain by Guy Rouquet( )

1 edition published in 2010 in French and held by 1 WorldCat member library worldwide

Two new concepts, aiming to substitute ditin radical chemistry by using silyl radicals, are developed throughout this manuscript. The first concept introduces “silaboranes”, molecules made up of a silane unit and a boron atom. For the first time, the ability of these precursors to generate trimethylsilyl radicals was demonstrated by using the SHi reaction at silicon (Intramolecular Homolytic Substitution) from disilanes. Besides, results are supported by kinetic and computationnal studies of the SHi reaction at silicon. Capacity of “silaboranes” to achieve tin-free radical processes was demonstrated thanks to radical addition of halogenated species on sulfonyl oxime ethers. “Silaboranes” concept was then extended to silicon hydrides using intramolecular hydrogen transfer as source of triphenylsilyl radicals. The second concept highlights the ability of allyl tris(trimethylsilyl)silanes to make possible tin-free radical reactions via beta-fragmentation of the tris(trimethylsilyl) group. These compounds, source of tris(trimethylsilyl) radicals and easily available, open very interesting perspectives in tin-free radical addition of bromides and iodides species on sulfonyl derivatives as allyl sulfones, vinyl sulfones or sulfonyl oxime ethers
Copolymères semi-conducteurs à architectures variées : de l'ingénierie macromoléculaire à l'électronique organique by Sébastien-Jun Mougnier( )

1 edition published in 2012 in French and held by 1 WorldCat member library worldwide

At a time when new technologies emerge every day, a specific domain stands out: the organic electronic. Through its low cost processing or even its utility, the organic electronic constitutes a very promising future.In order to improve the fabrication process and the lifetime of the devices, the work of this thesis was focused on the synthesis of copolymers with various architectures based on poly(3-hexylthiophene) (P3HT). After a first part where main issues and objectives are presented, the synthesis of different P3HT-based precursors is described in a part which could be considered as the heart of these works. Starting with appropriated precursors, the optimization of rod-coil diblock copolymer synthesis was performed following a strategy designed specifically for organic electronic application. Moreover, the precursors were used for the conception of new semi-conducting materials with a variety of architectures, such as graft and star copolymers. Finally, the last part deals with the integration of the P3HT-b-Poly(4-vinylpyridine) copolymer into organic solar cell as an additive of the active layer. This approach turns out to be powerful, especially allowing decreasing the time and the energy cost by avoiding the key step of the fabrication process of those devices, the annealing step
Synthesis and functionalization of fatty acid-based hyperbranched polymers by Quentin Passet( )

1 edition published in 2019 in French and held by 1 WorldCat member library worldwide

The aim of this thesis is to valorize oilseed biomass through the polymerization of building block, stemming from vegetable oils, into hyperbranched polymers. This research involves the synthesis and purification of a new bio-based monomer, coined as 10,11- epoxyundecanol (EUnd), which ring-opening multibranching polymerization (ROMBP) has generated bio-based hyperbranched polyethers (hbPEUnd). Conditions of polymerization have been studied in order to maximize yields of reaction and control both the chemical structure and the properties of hbPEUnd. Copolymerization of EUnd with glycidol has also been implemented, yielding hyperbranched copolyethers with varied properties (e.g. solubility). The second part of this work has been dedicated to the functionalization of bio-based hyperbranched polyesters, developed in the frame of a former project. Appropriate derivatizations have provided these modified polyesters with solubility in polar solvents and made them employable as curing agents
Synthèse de polyuréthanes par organo-catalyse dans le dioxyde de carbone supercritique by Christopher Smith( )

1 edition published in 2012 in French and held by 1 WorldCat member library worldwide

La synthèse de particules polyuréthane par organo-catalyse dans le dioxyde de carbone supercritique a été étudiée. Des réactions modèles ont été préalablement conduites et suivies par spectroscopie infrarouge in situ dans le CO2 supercritique afin d'identifier les catalyseurs organiques de réaction d'uréthanisation les plus efficients. Une série de polymères siliconés CO2-phile, porteurs de la fonction organo-catalytique en bout de chaîne (organo-catasurfs), a ensuite été préparée et testée dans le CO2 supercritique pour la polymérisation en dispersion de polyuréthane
 
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Alternative Names
Daniel Taton wetenschapper

Languages
French (16)

English (7)