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I) Cristallochimie des Carboxylates Métalliques Inhibiteurs de la Corrosion de Métaux et II) Structure et Magnétisme de Dicarboxylates (téréphtalate et thiophène) de Métaux de Transition

Abstract : The materials treated in this thesis are organized hybrid compounds belonging to the MOFs (Metal Organic Frameworks) family, associating a mineral component, a metallic oxide or hydroxide, and an organic part (a carboxylate or dicarboxylate). The crystallographic structures of the aliphatic metallic carboxylates with long chains, Zn(CnH2n-1O2)2 (n = 11, 12 and 14), Mg(C10H21O2)2(H2O)3 and Mg(C10H16O4)(H2O)2, were determined. The crystallochemistry of the carboxylates is more complex for zinc than for magnesium, due to the presence of polytypes and conformational disorder. A new family of mixed zinc carboxylates with carbon chains of various lengths was studied. The compound Ni3(OH)2(tp)2(H2O)4 (tp = C8H4O42-) (phase A) metamagnetic undergoes two successive dehydrations leading to the phases B Ni3(OH)2(tp)2(H2O)2 and C Ni3(OH)2(tp)2. The phases B and C are canted antiferromagnetic. The structure of the compound Ni3(OH)2(O2CC4H2SCO2)2(H2O)4 was resolved ab initio by XRPD. The magnetic structures of the compounds M(II)2(OH)2(tp) (Fe and Mn) and of the solid solution (FexCo2-x)(OH)2(tp) were determined by neutrons powder diffraction. The Mössbauer spectrometry of the 57Fe pointed out a spin-orbit coupling for iron atoms situated on the site 2b.
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Adel Mesbah. I) Cristallochimie des Carboxylates Métalliques Inhibiteurs de la Corrosion de Métaux et II) Structure et Magnétisme de Dicarboxylates (téréphtalate et thiophène) de Métaux de Transition. Autre. Université Henri Poincaré - Nancy 1, 2008. Français. ⟨NNT : 2008NAN10048⟩. ⟨tel-01748444⟩

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