Synthesis and Crystal Structure of an Inorganic-organic Hybrid Compound Containing a New Polymolybdate Cluster {Mo12}

摘要

A new low-nuclear polymolybdate cluster [CuⅡ4(opR)2(Mo12O40)]n·2nH2O was successfully isolated by the introduction of flexible multidentate 1,1'-(1,3-propanediyl)bis[2-(2-pyridyl)benzimidazole ligand (opr),(NH4)6Mo7O24·4H2O,and copper(Ⅱ) ions under hydrothermal conditions.Single-crystal X-ray analysis reveals that the complex crystallizes in the P21 space group with a =13.8437(5),b =19.3953(6),c =15.7681(6) (A),β =112.698(4)°,V=3905.9(2) (A)3,Z =4,Dc =2.502 g/cm3,μ =3.020 mm-1,F(000) =2824,the final R =0.0352,wR =0.0523 and S =0.783 for 7111 observed reflections with Ⅰ ＞ 2σ(Ⅰ).The structure of the compound contains a new type of low-nuclear (Mo12O40)8-polymolybdate cluster.These dodecamolybdate anions are linked together through sharing edges to form a 1D molybdenum oxide chain.Its photocatalytic performance for methylene blue (MB) was also studied under UV irradiation.