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Compuestos metal-orgánicos con propiedades multifuncionales

Abstract : The fact that metal-organic compound contains an organic and an inorganic part, makes these systems highly modulable, from the dimensionality of their structure to the properties that are obtained. For this reason during the last time, the coordination chemistry has been focused on the synthesis of new materials based on 3d and 4f cations, linked through organic ligand with functional groups of different chemical nature, which contribute to obtain new materials with interesting properties such as luminescence, non-linear optics and magnetism, among others. On the other hand, the synthesis of metal-organic compounds of greater dimensionality has been dominated by long reaction times, using organic solvents exposed to conditions of temperature and pressure higher than those used in traditional synthesis methods. However, the interest for new synthetic techniques with shorter reaction times and more friendly to the environment, such as mechanochemistry and sonochemistry has grown in last years. In this thesis, are reported the synthesis, structural and optical characterization of nine coordination compounds based on the imidazole-4-acrylic acid ligand. The compounds are classified into two types: (1) based on nd cations, which are the precursors of the type [M(HIA)2(H2O)4] (with M = CuII, NiII, CdII and ZnII), obtained by mechanochemical synthesis, and also the coordination polymer {[Cd(H2IA)(HIA)(H2O)2]2·H2O(NO3)2}n obtained by sonochemistry; and (2) nd/4f heterometallic compounds obtained by sonochemical synthesis, which are based on the CuII/EuIII, CuII/GdIII, CuII/CeIII and CdII/CeIV cations. It should be noted that the compounds based on the CuII/LnIII cations were also magnetically characterized. Additionally, a family of compounds based on NiII/LnII, obtained by structural synthesis is reported. Although, the H2IA ligand does not participate in the final product, the compounds are considered novel from the structural point of view, because the Ln2+ cation, had stabilized only in organometallic compounds until now. Finally, it is important to highlight that the thesis work presented has been carried out within the framework of a co-supervision between the Université de Rennes 1, France, and the Andrés Bello University, Chile, for which two stays were made in France, with six months of duration each one. The results presented were obtained in Laboratoire ISCR Institut des Sciences Chimiques in Rennes, France, and in the Laboratorio de Compuestos Polimetálicos, Chile.
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Bianca Baldo Hurtado. Compuestos metal-orgánicos con propiedades multifuncionales. Inorganic chemistry. Université Rennes 1, 2018. Español. ⟨NNT : 2018REN1S012⟩. ⟨tel-01838200⟩

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