Cooperative Effects of Cation Size and Variable Coordination Modes of Te4+ on the Frameworks of New Alkali Metal Indium Tellurites, NaIn(TeO3)(2), KIn(TeO3)(2), RbInTe3O8, and CsInTe3O8

作者：Bae Su whan; Kim Choong Yeol; Lee Dong Woo; Ok Kang Min^*

来源：Inorganic Chemistry, 2014, 53(20): 11328-11334.

DOI：10.1021/ic502108a

Four new alkali metal indium tellurites, NaIn(TeO3)(2), KIn(TeO3)(2), RbInTe3O8, and CsInTe3O8, have been prepared through hydrothermal and solid state synthesis reactions using corresponding alkali metal carbonates, In2O3 [or In(NO3)(3)center dot xH(2)O], and TeO2. The structures of the reported materials have been determined by powder and single crystal X-ray diffraction. The mixed indium tellurites reveal a rich structural chemistry with different channel structures. NaIn(TeO3)(2) shows 8-membered rings, whereas stoichiometrically similar KIn(TeO3)(2) exhibits both 8- and 12-membered rings in the frameworks. Isostructural RbInTe3O8 and CsInTe3O8 reveal three-dimensional frameworks consisting of InO6, TeO3, and TeO4 groups. Close structural examination suggests that the alkali metal cation size and variable coordination modes of Te4+ cations cooperatively influence the framework geometries of the new mixed metal tellurites. Detailed characterizations including spectroscopic, elemental, and thermal analyses are introduced. Local dipole moments and out-of-center distortions for the constituent polyhedra are also reported.

• 出版日期2014-10-20