基于五齿含氮配体构筑的杂多酸盐的合成及结构研究

Synthesis and Structure of a Polyoxometalate Based on a Pentadentate Nitrogen Ligand

采用水热合成法,通过调节反应的pH、温度、时间以及起始原料的物质的量的比,我们成功地合成了一个新的多酸基超分子化合物(H_3X)_4(SiW_(12)O_(40))·4H_2O(H_2X=2,6-二甲基(-3,5-二(吡唑-3-基)吡啶)。利用X-射线单晶衍射,元素分析、IR吸收光谱和热重分析对该化合物的结构进行了表征,检测结果表明该化合物属于单斜晶系,C2/c空间群,晶体数据:a=1.8850(5)nm,b=2.0835(5)nm,c=2.0888(5)nm,V=8.196(4)nm^3,β=92.39(0)°,Z=4,R_1=0.0386,wR_2=0.0735。

We used hydrothermal synthesis method to prepare a new polyoxometalate-based compound,（H_3X）_4（SiW_（12）O_（40））·4H_2O（H_2X=2,6-dimethy（-3,5-bis（pyrazol-3-yl）pyridine）, by controlling p H, temperature, reaction time and material ratio. The structure of the compound was characterized by X-ray single crystal diffraction, elemental analysis, IR spectra and thermogravimetric analysis.The results show that the compound belongs to monoclinic system,C2/c space group, crystal data：a=1.8850（5）nm,b=2.0835（5）nm,c=2.0888（5）nm,V=8.196（4）nm^3,β=92.39（0）°,Z=4,R_1=0.0386,wR_2=0.0735.