Hydrothermal Synthesis and Characterization of a Novel Organically-templated Tungsten Heteropolyacid with a Microporous Structure

摘要

A microporous organically-templated tungsten heteropolyacid, (C2N2H10)2[H2P2W18O62]·8H2O, with a new type was hydrothermally synthesized by using ethylenediamine as the structure-directing agent. Its structure was determined by single-crystal X-ray diffraction analysis. Crystal data: monoclinic, space group P21/c, a = 14.633(4), b = 19.432(5), c = 26.776(5)(A), β = 117.849(11)°, V = 6732(3) (A)3, Z = 4, Mr = 4615.48, Dc = 4.554 g/cm3, μ(MoKα) = 30.781 mm-1, F(000) = 7976, the final R = 0.0678 and wR = 0.1359. The crystal of the title compound is constructed by Dawson anions and organic dications forming a novel "hollow" channel system.