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<dc:title xml:lang="fr">Systèmes moléculaires hybrides polyoxométallates -(iso)porphyrines greffés de manière covalente : propriétés photo(électro)catalytiques</dc:title>
<dcterms:alternative xml:lang="en">Covalently grafted polyoxometalate-(iso)porphyrin hybrid molecular systems : photo(electro)catalytic properties</dcterms:alternative>
<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>
<dc:subject xml:lang="fr">Électropolymérisation</dc:subject>
<dc:subject xml:lang="fr">Propriétés photovoltaïques</dc:subject>
<dc:subject xml:lang="en">Isoporphyrin</dc:subject>
<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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<tef:elementdEntree autoriteExterne="061554073" autoriteSource="Sudoc">Polyoxométallates</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="032466935" autoriteSource="Sudoc">Électrocatalyse</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Une série de copolymères isoporphyrine-POMs a été préparée par électropolymérisation. Leurs propriétés photoélectrochimiques ont été étudiées. L'influence du type de POM utilisés a été étudiée (POM = polyoxométallate du type Anderson ou Dawson). Les résultats montrent que les propriétés photovoltaïques des copolymères du type isoporphyrine-Anderson ou type isoporphyrine-Dawson dépendent à la fois de la nature du centre métallique pour les POMs du type Anderson (Fe, Mn, Cu, Zn), mais aussi du type de groupement organique pendant greffé sur le POM du type Anderson ou Dawson. Leurs propriétés photovoltaïques montrent la génération de photocourant stable dans le temps. La réduction photocatalytique des ions métalliques (Ag+, AuIIICl3-, PtIVCl62-) a également été étudiée. La réduction photocatalytique fonctionne sous illumination visible et proche infra-rouge. Les copolymères peuvent être réutilisés plusieurs fois et conserver une efficacité élevée pour la photoréduction. En conclusion, ces copolymères hybrides isoporphyrine-POMs sont des candidats potentiels en tant que matériaux photovoltaïques et photocatalyseurs.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In this thesis, a series of isoporphyrin-POMs copolymers were prepared by electropolymerization. Their photoelectrochemical and photocatalysis properties were investigated.The influence of the type of POMs used has been studied (POM = Anderson- or Dawson-type Polyoxometalate). The results show that the photovoltaic properties is dependent of the type of POM as well as the type of spacer used between the isoporphyrin and the POM subunits.The nature of the metal center of the Anderson-type POM (Fe, Mn, Cu, Zn) and as well as the type of pendant organic group grafted were then modulated and studied with respect to their photovoltaic properties.Their application in photocatalytic metal ions (Ag+, AuIIICl3-, PtIVCl62-) reduction has been also studied. The photocatalytic reduction is working under visible-NIR. The copolymers can be reused several times and keep high efficiency.They will be potential candidate acted as photovoltaic materials and photocatalyst.</dcterms:abstract>
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