A New 3-D Network Based on Large Mo18-Polyoxometalate Anionic Units and Alkaline Cations

摘要

The new polyoxomolybdate 1 was prepared from an aqueous solution by the reaction of Na2MoO4·H2O, NH2NH2·2HCl and HCOONa, and characterized by IR spectroscopy, elemental analysis and single-crystal X-ray structural analysis. Crystal data: C4H72ClMo18Na13O94, Mr=3685.86, triclinic, space group P(1), a=11.922(5), b=15.003(5), c=15.171(5) (A), α=116.073(5), β=112.593(5), γ=93.342(5)°, V=2164.3(14) (A)3, Z=1, Dc=2.828 g/cm3, F(000)=1764, μ=2.741 mm-1, R=0.0349 and wR=0.0875 (Ⅰ ＞ 2σ(Ⅰ)). X-ray crystal structure analysis shows that 1 is constructed by Mo18 polyoxoanions linked by Na+ cations to form a fascinating 3D open framework with "guest" Na+ cations and formyl groups residing in the channels.