Abstract
Two new organic-inorganic hybrid compound, (C5H5N5)(2)(C5H6N5)(4)[(HAsO4)(2)Mo6O18]center dot 11H(2)O (I) and Na-2(Himi)(3)[SeMo6O21(CH3COO)(3)]center dot 6H(2)O (II) were synthesized and structurally characterized by scanning electron microscopy (SEM), elemental analyses, FTIR, UV spectroscopy, thermal stability analysis, XRD and single crystal X-ray diffraction. Crystal data: (I) triclinic system, space group P-1, a = 11,217 (9) angstrom, b = 11,637 (8) angstrom, c = 14,919 (8) angstrom, alpha = 70,90 (5)degrees, beta = 70,83 (2)degrees, gamma = 62,00(1)degrees and Z = 1; (II) triclinic system, space group P-1, a = 10.6740(1) angstrom, b = 10.6740(1) angstrom, c = 20.0570(1) angstrom, alpha = 76.285(1)degrees, beta = 82.198(2)degrees, gamma = 87.075(1)degrees, Z = 1. The crystal structure of (I) can be described by infinite polyanions [(HAsO4)(2)Mo6O18](4-) organized with water molecules in layers parallel to the c -direction; adjacent layers are further joined up by hydrogen bonding interactions with organic groups which were associated in chains spreading along the b -direction. The structure of (II) consists of functionalized selenomolybdate clusters [SeMo6O21(CH3COO)(3)](5-), protonated imidazole cations, sodium ions and lattice water molecules, which are held together to generate a three-dimensional supramolecular network via hydrogen -bonding interaction. Furthermore, the electrochemical properties of these compounds have been studied. (C) 2016 Elsevier B.V. All rights reserved.