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<dc:title xml:lang="fr">Des couplages croisés à l'électronique moléculaire</dc:title>
<dcterms:alternative xml:lang="en">From palladium-catalyzed cross-coupling reactions to organic electronics</dcterms:alternative>
<dc:subject xml:lang="fr">Couplages croisés</dc:subject>
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<dc:subject xml:lang="fr">Alcynes</dc:subject>
<dc:subject xml:lang="fr">Hydrocarbures polycycliques aromatiques</dc:subject>
<dc:subject xml:lang="fr">Semiconducteur organique</dc:subject>
<dc:subject xml:lang="fr">Transistor à effet de champ</dc:subject>
<dc:subject xml:lang="en">Cross-coupling</dc:subject>
<dc:subject xml:lang="en">Palladium</dc:subject>
<dc:subject xml:lang="en">Sulfonates</dc:subject>
<dc:subject xml:lang="en">Metathesis</dc:subject>
<dc:subject xml:lang="en">Alkynes</dc:subject>
<dc:subject xml:lang="en">Polycyclic aromatic hydrocarbons</dc:subject>
<dc:subject xml:lang="en">Organic semiconductor</dc:subject>
<dc:subject xml:lang="en">Field-effect transistor</dc:subject>
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<tef:elementdEntree autoriteExterne="029608260" autoriteSource="Sudoc">Électronique moléculaire</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les appareils de haute technologie (ordinateurs, télévisions, téléphones, …) sont fabriqués à partir de composants relativement simples (transistors, diiodes électroluminescentes, …) qui utilisent du silicium comme semiconducteur. En électronique moléculaire, les composés organiques π- conjugués qui ont un écart HOMO-LUMO faible peuvent présenter cette propriété. Dans le cadre de ce travail, nous avons étudié la synthèse de nouveaux semiconducteurs organiques parpolymérisation par métathèse d’alcynes. Pour cela, des composés de type dialcynylaromatique ont été préparés. Leur étude en polymérisation ainsi que leurs propriétés électroniques ont été réalisées dans des laboratoires collaborateurs d’un projet ANR (CADISCOM). Dans une seconde partie, indépendante de la première, les couplages croisés catalysés par le palladium sont d’une importance capitale dans la chimie organique de synthèse actuelle. De nombreux travaux ont été menés sur le partenaire organométallique de la réaction, mais très peu en ce qui concerne le partenaire électrophile. Lors de ce travail, nous avons élaboré un nouveau groupe partant à partir de précurseurs très peu onéreux que nous avons pu appliquer dans les quatre "grands couplages" les plus utilisés (Suzuki, Stille, Sonogashira et Heck).</dcterms:abstract>
<dcterms:abstract xml:lang="en">High-technology devices (computers, TV, mobile phones, …) are manufactured from simple components (transistors, LED, …) which use silicium as semiconductor. In organic electronics, π- conjugated organic compounds with low HOMO-LUMO gap can show this property. This work is dealing with the synthesis of new organic semiconductors via alkyne metathesis polymerization.Dialkynyl compounds were synthetized. Their polymerization studies as well as electronic characterization were conducted by collaborating groups in an ANR project (CADISCOM). In an independent second part, palladium-catalyzed cross-coupling are of great importance in actual organic synthesis. Many studies have been focused on the organometallic partner of the reaction,but the electrophilic partner have received much less attention. In this work, we developed a new leaving group from cheap precursors that we applied in the four most well-known couplings (Suzuki, Stille, Sonogashira, Heck).</dcterms:abstract>
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