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Assemblages de coordination de platine luminescents : reconnaissance, interactions métal---métal, et chiralité

Abstract : The PhD research work presented herein deals with the synthesis of novel class of luminescent coordination platinum assemblies. Owing to the now-how of the group two strategies were followed: (i) The first approach consists in the self-assembly of novel family the platinum metallacages of the formula [Pt2L4][OTf]4 containing various rigid bidentate ligands. The molecular structures of several complexes were determined. The absorption and emission properties of these metallacages were investigated. Moreover the Pt2L4 (L = 5-methoxy-1,3-bis(pyridin-3-ylethynyl)benzène) showed interesting properties as host molecule towards a series of square planar metal complexes acting as guests. Remarkably the molecular structure of a rare host-guest system in which the anion dithiobenzene gold(III) complex [Au(bdt)2]-1 was encapsulated is determined. The solution behavior was also investigated. Moreover (ii) in a second approach the synthesis of a unique type of luminescent platinum assemblies containing a novel organometalloligand bearing chiral function is described. The organometalloligand allows a fine control of the chirality of the assemblies at the supramolecular level as well as the modulation of the intermolecular Pt···Pt and π-π interactions. Indeed several X-ray molecular structures were determined and confirmed this behavior. The luminescent properties of these compounds were investigated in solution and in solid state and showed that these compounds act as deep red emitters with good quantum yields. Furthermore the chiroptical properties of the enantiopure platinum complexes were investigated as well as their circular polarized luminescence (CPL) properties.
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Emmanuel Puig. Assemblages de coordination de platine luminescents : reconnaissance, interactions métal---métal, et chiralité. Chimie théorique et/ou physique. Université Pierre et Marie Curie - Paris VI, 2017. Français. ⟨NNT : 2017PA066473⟩. ⟨tel-01795164⟩

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