Browsing by Autor "Leiva, Naviana"

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    Crystal structure and Hirshfeld surface analysis of poly[tris-(μ4-benzene-1,4-di-carboxyl-ato)tetra-kis-(di-methyl-formamide)-trinickel(II)]: a two-dimensional coordination network.
    (2019) Ajpi, Cesario; Suescun, Leopoldo; Leiva, Naviana; Lundblad, Anders; Lindbergh, Göran; Cabrera, Saul
    The crystal structure of the title compound, [Ni3(C8H4O4)3(C3H7NO)4], is a two-dimensional coordination network formed by trinuclear linear Ni3(tp)3(DMF)4 units (tp = terephthalate = benzene-1,4-di-carboxyl-ate and DMF = di-methyl-formamide) displaying a characteristic coordination mode of acetate groups in polynuclear metal-organic compounds. Individual trinuclear units are connected through tp anions in a triangular network that forms layers. One of the DMF ligands points outwards and provides inter-actions with equivalent planes above and below, leaving the second ligand in a structural void much larger than the DMF mol-ecule, which shows positional disorder. Parallel planes are connected mainly through weak C-H⋯O, H⋯H and H⋯C inter-actions between DMF mol-ecules, as shown by Hirshfeld surface analysis.
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    PERSPECTIVAS EN EL PROCESAMIENTO DE MATERIALES-ELECTRODOS PARA BATERÍAS DE ION LITIO EN BOLIVIA
    (Rev. Bol. Quim, 2012) Cabrera, Saúl; Benavente, Fabián; Vargas, Max; Flores, José Luis; Ortega, Manuel; Villca, Jaime; Mamani, Rafael; Leiva, Naviana; Luna, Martin; Yapu, Waldo; Blanco, Mario; Palenque, Eduardo R.; Balanza, Rodny
    Se analiza la síntesis, caracterización y las propiedades electroquímicas de diferentes electrodos para baterías de ion litio, identificándose los precursores y los métodos de síntesis, resaltando los procesos de los materiales obtenidos en Bolivia, y las propiedades comerciales ofertadas para estos materiales por diferentes empresas. Finalmente se hace la identificación de los procesos de obtención para dos electrodos catódicos (LiMn2O4) y del (LiFePO4), a partir de potenciales precursores existentes en Bolivia.