Solid-State and Solution Self-assembly Properties of Mono- and Bis-acetylide RuII Complexes Bearing Hydrogen-Bonding Amide Functions |
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Authors: | Dr Olivier Galangau Dr Elsa Caytan William T Gallonde Dr Isabelle de Waele Dr Franck Camerel Prof Stéphane Rigaut |
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Institution: | 1. Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, 35000 Rennes, France;2. LASIRE, UMR 8516, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq, France |
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Abstract: | In this work, we report our latest results regarding the self-assembly properties of two Ru-acetylides complexes and their corresponding free organic ligands, in solution and in the solid state. The four compounds show mesogenic properties, which we have rationalized thanks to extensive DSC, SAXS, POM, FTIR and molecular dynamic investigations. We clearly establish that hydrogen bonds stabilize the supramolecular structures, and that introducing the metal center and its coordination sphere induces large change in the liquid crystal properties. In addition, for the monoacetylide compound Ru2 , solution-state studies helped us rationalize its supramolecular abilities. In particular, we demonstrate that Ru2 follows an isodesmic growth supramolecular polymerization in aromatic solvent. |
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Keywords: | Hydrogen bonds Liquid crystals Metallomesogens Ru acetylides Self-assembly |
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