合成了SnII取代的钨磷、钨硅杂多化合物,用IR、电子光谱、31P NMR对样品进行了表征,并对其热稳定性和循环伏安性质进行了测定.结果表明,SnII取代化合物具有Keggin结构,但Sn2+并未进入空穴位的中心.SnII的引入提高了S i系化合物的热稳定性,但使杂多阴离子的可还原性降低. SnII-substituted tungstophosphoric and tungstosilicic heteropoly compounds were synthesized, and the samples were characterized by IR, electronic spectra and 31P NMR.The thermal stability and cyclic voltammetry were also tested.The results show that SnII substituted compounds have Keggin structure, but Sn2 + did not enter the hole center. The introduction of Sni increased the thermal stability of Si compounds, but reduced the reducibility of heteropolyanions.