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<dc:title xml:lang="fr">Vers la conception de matériaux hybrides colorés à base de titane(IV)</dc:title>
<dcterms:alternative xml:lang="en">Towards new hybrid colored materials based on titanium(IV)</dcterms:alternative>
<dc:subject xml:lang="fr">Matériaux hybrides</dc:subject>
<dc:subject xml:lang="fr">Approche séquentielle</dc:subject>
<dc:subject xml:lang="fr">Oligophénylène</dc:subject>
<dc:subject xml:lang="fr">Alcoxyde de titane</dc:subject>
<dc:subject xml:lang="fr">Ti10O12(cat)8(pyr)8</dc:subject>
<dc:subject xml:lang="fr">Absorption dans le visible</dc:subject>
<dc:subject xml:lang="fr">Gap HOMO-LUMO</dc:subject>
<dc:subject xml:lang="fr">Oxo-cluster</dc:subject>
<dc:subject xml:lang="fr">Poly(4-vinylpyridine)</dc:subject>
<dc:subject xml:lang="en">Hybrid materials</dc:subject>
<dc:subject xml:lang="en">Sequential approach</dc:subject>
<dc:subject xml:lang="en">Oligophenylene</dc:subject>
<dc:subject xml:lang="en">Titanium alkoxide</dc:subject>
<dc:subject xml:lang="en">Titanium alkoxide</dc:subject>
<dc:subject xml:lang="en">Visible light absorption</dc:subject>
<dc:subject xml:lang="en">HOMO-LUMO gap</dc:subject>
<dc:subject xml:lang="en">Oxo-cluster</dc:subject>
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<tef:elementdEntree autoriteExterne="034762590" autoriteSource="Sudoc">Matériaux hybrides</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="031725376" autoriteSource="Sudoc">Titane -- Composés</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Le domaine de la science des matériaux et plus particulièrement celui des matériaux hybrides suscite un intérêt croissant en raison de leurs nombreuses applications. Dans ce travail, deux stratégies synthétiques ont été considérées pour la synthèse de matériaux hybrides.Dans une première partie, nous nous sommes intéressés à une approche de synthèse directe en faisant réagir des ligands organiques de type oligophénylène avec de l’isopropoxyde de titane. Malheureusement, ces réactions ont conduit à la précipitation de solides amorphes ne permettant pas la caractérisation de ces produits.Dans une seconde partie, une approche de synthèse séquentielle qui consiste à synthétiser un objet précondensé pouvant s’auto-Assembler dans un second temps avec des ligands organiques a été proposée. Cette approche nous a conduits à synthétiser une nouvelle brique de formule Ti10O12(cat)8(pyr)8 et de trois dérivés de formules analogues Ti10O12(cat)8(pyr’)8 (pyr’ = pyridines substituées) obtenus par échange de ligands. Ces complexes, qui présentent des propriétés d’absorption dans le visible, ont été étudiés par spectroscopie d’absorption UV-Vis et grâce à des calculs théoriques. Puis nous avons utilisé le motif [Ti10O12(cat)8] pour générer des matériaux hybrides via des substitutions de ligands par des molécules polytopiques comme la 4,4’-Bipyridine et la poly(4-Vinylpyridine).</dcterms:abstract>
<dcterms:abstract xml:lang="en">In the field of materials science, hybrid materials are of crucial importance due to their numerous applications. In this work, two strategies were considered to synthesize such hybrid materials.In a first part, we have tackled a one step synthetic approach by reacting resorcinol-Based oligophenylene organic ligands with titanium isopropoxide. Unfortunately, these reactions led to amorphous solids and no further structural information concerning these precipitates was obtained.In a second part, we have described a sequential approach which first concerns the preparation of pre-Ordered systems that are, in a second step, self-Assembled with organic linkers. Thus, our approach deals with the preparation of a new building block formulated as Ti10O12(cat)8(pyr)8 and three derivatives formulated as Ti10O12(cat)8(pyr’)8 (pyr’ = substituted pyridine) obtained by ligands exchange. These complexes exhibit visible light absorption properties that were studied through UV-Vis absorption spectroscopy and theoretical calculations. Then, the [Ti10O12(cat)8] motif was used to generate hybrid materials via ligands substitutions with polytopic ligands such as 4,4’-Bipyridine and poly(4-Vinylpyridine).</dcterms:abstract>
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