A new 1-D chain-like organic-inorganic hybrid phosphotungstate constructed by sandwich-type clusters and [Ni(en)_2]~(2+) linkers

摘要

A new 1-D chain-like organic-inorganic hybrid phosphotungstate based on tetra-Ni-sandwiched polyoxoanion, [Ni(en)_2]i{Ni_3(en)_6(H_2O)_2Ni_4(H_2O)_2(alpha-PW_9O_(34))_2}] - 7H_2O (en = ethylenediamine) (1), has been synthesized under hydrothermal conditions and characterized by IR spectrum, UV spectrum, elemental analysis, thermogravimetric analysis, and single-crystal X-ray diffraction. 1 crystallizes in the triclinic P1 space group with cell parameters a= 13.232(4) A, b= 15.591(5)A, c= 15.701(5)A, alpha= 112.804(5)°, beta = 92.159(5)°, gamma= 109.012(5)°, Z=1, R_1 =0.0588, wR_2 = 0.1387. Compound 1 displays a 1-D chain-like architecture constructed by sandwich-type polyoxoanions and [Ni(en)_2]~(2+) linkers. Magnetic measurement reveals that intramolecular ferromagnetic interactions exist in the tetranuclear {Ni_4O_(16)} cluster.