Keggin结构多酸属配合物[Cu（phen）2]4（SiW12）O40）的设计合成、表征及催化性能

以Keggin结构多金属氧酸盐（Si W12）为建筑块,在水热条件下,设计合成了多酸属-有机配合物Cu（phen）2]4（Si W12O40）（phen=1,10-邻菲咯啉）（化合物1）,利用X-射线单晶衍射、红外光谱、元素分析等对其组成及结构进行了表征,并研究了对乙酸乙酯合成反应的催化性能.单晶解析数据表明,化合物1为P212121空间群,单元结构中包含1个α-Keggin型的阴离子（Si W12O40）4-和4个阳离子Cu（phen）2]＋,价键计算结果表明,4个2价铜离子均被还原为1价.化合物1对乙酸乙酯合成反应具有一定的催化作用,在相同反应条件下,其催化性能优于浓硫酸.

Systhesis, characterize, and catalytic ability of [Cu(phen)2]4[SiW12O40] based on the Keggin-type POMs

A new POM-based hybrid compound Cu（phen）2]4（SiW12O40）（phen =1,10-phenanthroline）（compound 1） has been successfully synthesized by using the Keggin anion（SiW12O40）4-as building block under the hydrothermal condition.It has been characterized by single crystal X-ray diffraction,IR,elemental analysis.And its catalytic action on the synthesis of acetic esteσ was discussed.Compound 1 crystallizes in the orthorhombic space group P212121,it consists of one α-Keggin anion（SiW12O40）4– and four Cu（phen）2]＋ cations.The valence sum calculations for the Cu atoms suggest that all four Cu atoms are in ＋1 oxidation state.The results show that compound 1 has well-defined catalytic ability toward the synthesis of acetic esteσ.In the same condition,the catalytic ability of compound 1 is better than concentrated sulfuric acid.