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Synthèse et caractérisation de nouveaux polymères du fer(II) à transition de spin

Abstract : This dissertation deals with the synthesis of new iron(II) coordination polymers, the study of their magnetic and structural properties and the investigation of the factors that can give rise to highly cooperative spin transitions in solid state systems. Several families of spin crossover polymers with bridging ligands such as dicyanamide or bipyridine were obtained by an autoassembly method. The intersite interactions, as well as their influence on the magnetic properties of those systems, were studied through in-depth analysis of their single crystal X-ray diffraction structure. It is observed that the non-covalent interactions that connect the polymeric chains, such as hydrogen bonds and pi-stacking, play a bigger part in enhancing the cooperativity of the spin transition in those systems than the bridging ligands which covalently connect the metal sites together and spread elastic interactions between them.
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Contributor : Caroline Genre <>
Submitted on : Monday, June 2, 2008 - 3:41:22 PM
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  • HAL Id : tel-00284279, version 1


Caroline Genre. Synthèse et caractérisation de nouveaux polymères du fer(II) à transition de spin. Chimie. Ecole normale supérieure de lyon - ENS LYON; Université de Lyon, 2007. Français. ⟨tel-00284279⟩



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