Hydrothermal Synthesis and Structural Characterization of two Hybrid Keggin-based Polyoxometalates

摘要

Two new hybrid polyoxotungstates,[Co(2,2′-bipy)3][α-H5PW11CoO40]·3H2O 1 and [Fe(2,2′-bipy)3]2[α-HBW12O40]·2.5H2O 2(2,2′-bipy = 2,2′-dipyridyl),have been hydrothermally synthesized and characterized by IR,TGA and single-crystal X-ray structural analyses.The results of X-ray crystallography analyses exhibit that 1 consists of one α-Keggin anion [α-H5PW11CoO40]2- and one isolated [Co(2,2′-bipy)3]2+ complex,while 2 is constructed from one α-Keggin anion [α-HBW12O40]4- and two isolated [Fe(2,2′-bipy)3]2+ cations.The data for 1:orthorhombic system,space group Pbcn,a = 16.062(6),b = 27.278(10),c = 16.951(6) ,V = 7427(5) 3 and Z = 4;and those for 2:triclinic system,space group P,a = 13.787(3),b = 17.857(5),c = 18.918(5) ,α = 88.009(12),β = 72.768(10),γ = 74.935(10)o,V = 4291(2) 3 and Z = 2.