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<dc:title xml:lang="fr">Synthèses et propriétés de cages moléculaires commutables</dc:title>
<dcterms:alternative xml:lang="en">Synthesis and properties of switchable molecular cages</dcterms:alternative>
<dc:subject xml:lang="fr">Cage moleculaire covalente</dc:subject>
<dc:subject xml:lang="fr">Porphyrine</dc:subject>
<dc:subject xml:lang="fr">Réaction CuAAC</dc:subject>
<dc:subject xml:lang="fr">Triazole</dc:subject>
<dc:subject xml:lang="fr">Encapsulation</dc:subject>
<dc:subject xml:lang="fr">Synthèse organique</dc:subject>
<dc:subject xml:lang="fr">Chimie de coordination</dc:subject>
<dc:subject xml:lang="fr">Argent(I)</dc:subject>
<dc:subject xml:lang="fr">Cage commutable</dc:subject>
<dc:subject xml:lang="fr">Contrôle allostérique</dc:subject>
<dc:subject xml:lang="fr">DOSY</dc:subject>
<dc:subject xml:lang="en">Moleculat covalent cage</dc:subject>
<dc:subject xml:lang="en">Prophyrin</dc:subject>
<dc:subject xml:lang="en">CuAAC reaction</dc:subject>
<dc:subject xml:lang="en">Triazole</dc:subject>
<dc:subject xml:lang="en">Encapsulation</dc:subject>
<dc:subject xml:lang="en">Organic synthesis</dc:subject>
<dc:subject xml:lang="en">Coordination chemistry</dc:subject>
<dc:subject xml:lang="en">Silver(I)</dc:subject>
<dc:subject xml:lang="en">Switchable cage</dc:subject>
<dc:subject xml:lang="en">Allosteric control</dc:subject>
<dc:subject xml:lang="en">DOSY</dc:subject>
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<tef:elementdEntree autoriteExterne="030016266" autoriteSource="Sudoc">Liaisons covalentes</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="183913167" autoriteSource="Sudoc">Encapsulation (chimie)</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Ce travail s’inscrit dans le domaine des cages moléculaires, édifices dont la géométrie définit unecavité tridimensionnelle capable de contenir d’autres entités.L’objectif de cette thèse est la synthèse de cages moléculaires covalentes possédant despropriétés d’encapsulation et une taille modulables. Les cages synthétisées avec succèsincorporent des porphyrines de zinc ou bases libres, ainsi que huit ligands triazoles périphériques.Des molécules ont pu être encapsulées par coordination aux porphyrines ou par interactions π, cequi démontre la capacité de la cage à s’adapter à l’invité grâce à sa flexibilité. La coordinationd’ions argent(I) permet de passer d’une conformation aplatie à une conformation ouverte. Lecaractère commutable de la cage a été démontré par décoordination de ces ions. Enfin, lacoordination d’ions argent(I) aux ligands de la cage augmente la stabilité de deux ligandsditopiques, le DABCO et la pipérazine, au sein de la cavité. Elle permet aussi l’accès de la cavité àdes molécules non encapsulées en l’absence d’argent(I). Ces résultats démontrent le contrôleallostérique de l’encapsulation de molécules par un stimulus chimique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This work belongs to the field of molecular cages, hollow structures enclosing a three-dimensionalcavity able to encapsulate other molecules.The goal of this thesis include the synthesis of molecular covalent cages with a controllablecavity size able to perform switchable guest encapsulation. A DABCO-templated click reactionafforded three flexible covalent cages, endowed with two zinc(II) or free-base porphyrins and eightperipheral triazole ligands. Various guest molecules could be encapsulated by coordination toporphyrins or π-π interactions, in an induced-fit mechanism, probing the ability of the cage to adaptto the guest thanks to its flexibility. Coordination of silver(I) ions to the peripheral triazoles allow toswitch from a flattened to an open and locked conformation. Removal of the ions proved thecommutability of the cage. Finally, coordination of silver(I) ions to triazole ligands increase thestability of two ditopic ligands, DABCO and piperazine, inside the cavity. It also allowed the accessto the cavity of molecules that were not otherwise encapsulated. These results shows the allostericcontrol of guest encapsulation by a chemical stimulus.</dcterms:abstract>
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