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<dc:title xml:lang="fr">Copolymères hybrides organiques-inorganiques isoporphyrines-polyoxométallates : propriétés photovoltaiques et photocatalytiques</dc:title>
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<dc:subject xml:lang="fr">Isoporphyrine</dc:subject>
<dc:subject xml:lang="fr">Polyoxométallate</dc:subject>
<dc:subject xml:lang="fr">Copolymères organiques-inorganiques</dc:subject>
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<dc:subject xml:lang="fr">Propriétés photovoltaiques</dc:subject>
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<dc:subject xml:lang="en">Polyoxometalate</dc:subject>
<dc:subject xml:lang="en">Organic-inorganic copolymers</dc:subject>
<dc:subject xml:lang="en">Electropolymerization</dc:subject>
<dc:subject xml:lang="en">Photovoltaic properties</dc:subject>
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<dcterms:abstract xml:lang="fr">Dans cette thèse, une série de copolymères isoporphyrine-POMs a été préparée par électropolymérisation. Leurs propriétés photoélectrochimiques ont été étudiées.Dans un premier temps, l'influence du type de POM utilisés a été étudiée. Les résultats montrent que les copolymères du type isoporphyrine-Anderson présentent de meilleures propriétés photovoltaïques. La nature du centre métallique du POM du type Anderson et le type de groupement organique pendant greffé sur le POM du type Anderson ont ensuite été modulé et étudiés vis-à-vis de leurs propriétés photovoltaïques. Leurs propriétés photovoltaïques ont été évaluées et montrent la génération de photocourant important, le photocourant le plus élevé atteignant -516 µA.cm-2. La réduction photocatalytique des ions métalliques a également été étudiée. La réduction photocatalytique fonctionne non seulement sous illumination visible mais également sous éclairage proche infra-rouge même si la cinétique de la photoréduction est beaucoup plus lente. Les copolymères peuvent être réutilisés plusieurs fois et conserver une efficacité élevée pour la photoréduction.En conclusion, ces copolymères hybrides isoporphyrine-POMs présentent des propriétés photovoltaïques remarquables. Ils sont des candidats potentiels en tant que matériaux photovoltaïques, photocatalyseurs et dispositifs photoélectroniques.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In this thesis, a series of isoporphyrin-POMs copolymers were prepared by electropolymerization. Their photoelectrochemical properties were investigated.Firstly, the influence of the type of POMs used has been studied. The results show that isoporphyrin-Anderson-type POMs exhibit better photovoltaic properties.The nature of the metal center of the Anderson-type POM and the type of pendant organic group grafted onto the Anderson-type POM were then modulated and studied with respect to their photovoltaic properties. Their photovoltaic properties have been studied and show the generation of significant photocurrent, the highest photocurrent reaching -516 µA.cm-2.Their application in photocatalytic metal ions reduction also studied. The photocatalytic reduction is not only working under visible illumination but also under NIR illumination even if the kinetic of the photoreduction is slower. The copolymers can be reused several times and keep high efficiency.In conclusion, these hybrid isoporphyrin-POMs copolymers display remarkable photovoltaic properties. They will be potential candidate acted as photovoltaic materials, photocatalyst, and photoelectronic device.</dcterms:abstract>
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