crystal structure, vibrational studies and optical properties of a new molybdo-tellurate na6(temo6o24)(h2so4)2·12h2o

Single crystals of a new molybdo-tellurate compound na6(temo6o24)·(h2so4)2·12h2o(i) were grown by the low-evaporation technique and characterized by x-ray diffraction, infrared absorption and uv–vis absorption. the compound crystallizes in the monoclinic system and c2/m space group with a = 16.431(1) å, b = 12.493(1) å, c = 10.329(1) å, β = 109.55(1), v = 1998.1(2) å3, z = 2, r = 0. 0.0395 and wr (f2) = 0.090 for 1890 unique observed reflections [i > 2 s(i)]. the crystal structures exhibit three-dimensional supramolecular assembly based on the extensive hydrogen bonding interactions between h2so4 molecule, sodium cations, water molecules and anderson polyoxoanions (temo6o24)6−. the infrared spectrum fully confirms the x-ray crystal structure, and the uv spectrum of the title compound exhibits an absorption peak at 220 nm.