(C5H7N2)3(AsMo12O40)·3C5H6N2·2H2O的水热合成、晶体结构及催化性能

采用水热法合成了一种新的3-氨基吡啶砷钼多金属氧酸盐配合物(C5H7N2)3(AsMo12O40)·3C5H6N2·2H2O。 通过单晶X射线衍射、红外光谱、紫外光谱和差热-热重对其进行了表征。 用催化消除丙酮的反应为模式反应，测试了配合物的催化性能。 研究结果表明，标题配合物是由Keggin结构AsMo12O40]3-杂多阴离子、C5H7N2]+阳离子、C5H6N2]分子和结晶水分子组成。 配合物属于单斜晶系，P21/n空间群；晶胞参数a=1.33820(12) nm，b=2.2542(2) nm，c=1.9848(2) nm，β=100.27(3)°，V=5.8912(10) nm3，Z=4，Rgt(F)=0.0590，wRref(F2)=0.1882。 配合物对催化消除丙酮具有较好的的活性，催化实验结果表明，160 ℃下，0.20 g的催化剂可将初始浓度均为1.3 g/m3，流速为4.5 mL/min的丙酮完全消除。

Hydrothermal synthesis,crystal structure and Catalytic performance of (C5H7N2)3(AsMo12O40)·3C5H6N2·2H2O

A novel compound, (C5H7N2)3(AsMo12O40)·3C5H6N2·2H2O, has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, IR, UV/Vis and TG-DTA. Using catalytic elimination reaction of acetone as a model reaction, the catalytic performance of the title compound has been tested. The results indicate that the structure of the title compound consists of AsMo12O40]3- heteropolyoxoanion, C5H7N2]+ cations, C5H6N2] molecules and water molecules. The compound crystallizes in the monoclinic, space group P21/n, a=1.33820(12) nm，b=2.2542(2) nm，c=1.9848(2) nm，β=100.27(3) °，V=5.891 2(10) nm3，Z=4，Rgt(F)=0.0590，wRref(F2)=0.1882. The compound has a good catalytic activity for the elimination of acetone. When the initial concentration of acetone is 1.3 g/m3 in the air with a flow velocity of 4.5 mL/min, the acetone is completely eliminated at 160 ℃ over 0.20 g of the title compound.