基于含氮羧酸配体构筑的多酸盐合成及性质研究

Synthesis and Properties of Polyoxometalates Based on Nitrogen-containing Carboxylic Acid Ligands

选用1-(4-羧基苄基-3-(吡嗪-2-基)吡唑(缩写为HL)、醋酸银、硅钨酸为主要原料,利用水热合成法,通过调节p H值和物料配比等反应条件,制成了一种具有立体结构的三维超分子化合物,即。[Ag_(2)(HL)_(2)(H_(2)L_(2))](SiW_(12)O_(40))·6H_(2)O利用TGA、IR与X射线粉末衍射,我们对此化合。物的内部结构进行了分析,得出其是一种三斜晶系化合物、空间群为P-1,晶胞参数如下:a=12.5290(2)A,b=14.0790(2)A,c=14.4380(3)A,α=89.301(5)°,β=71.956(4)°,γ=72.842(4)°,V=2305.0(7)A^(3),Z=1。光催化性质测试结果显示该化合物对亚甲基蓝表现出很好的光催化降解能力。

A new 3D supramolecular compound,[Ag_(2)(HL)_(2)(H_(2)L)_(2)](SiW_(12)O_(40))·6 H_(2)O(HL=1-(4-carboxylbenzy)l-3-(pyrzin-2-yl)pyrazole),was successfully synthesized under hydrothermal conditions by using 1-(4-carboxylbenzyl-3-(pyazine-2-yl)pyrazole,silver acetate and silicotungstic acid as the main raw materials and by adjusting the reaction conditions such as pH value and material ratio.The crystal structure of the compound was characterized by single crystal X-ray diffraction analysis,infrared spectroscopy and thermogravimetry.The results show that the compound belongs to triclinic crystal system,space group P-1.The crystal cell parameter a=12.5290(2)A,b=14.0790(2)A,c=14.4380(3)A,α=89.301(5)°,β=71.956(4)°,γ=72.842(4)°,V=2305.0(7)A^(3),Z=1.The study of photocatalytic properties shows that the compound has a good photocatalytic ability to degrade methylene blue.