多金属氧酸盐的红外光谱

Infrared Spectra of Polyoxometalates

系统地综述了多金属氧酸盐的红外光谱。重点论述了近年来新合成的多金属氧酸盐的红外光谱特征,发现多金属氧酸盐红外光谱的最佳特征区在1100～400cm-1左右,产生的吸收是由金属—氧的伸缩振动所致。分别对Keggin,Dawson,Waugh,Anderson几种典型结构的多金属氧酸盐的特征峰及不同的反荷离子引起振动峰不同程度的红移或蓝移进行了归纳和总结;阐述了掺杂不同杂原子后由于分子结构对称性降低,使振动峰发生分裂。红外光谱作为一种常用的分析手段,可以鉴别多阴离子及用于结构分析。

The infrared spectra of polyoxometalates are addressed. The vibration frequencies of some synthesized polyoxometalates in recent years are emphasized. It was found that the infrared spectra of polyoxometalates result from stretch vibration frequency of the metal-oxygen, and 1 100-400 cm(-1) is the region of the characteristic absorption peak. The infrared spectrum contains information about the symmetry of polyoxoanion as well. As an analytical means, the infrared spectrum can be used to distinguish heteropolyanion and provide information on structure.