以钨磷(硅)酸和磺胺为原料在水相中合成了2个Keggin结构杂多酸电荷转移配合物(C6H9N2O2S)3PW12O40·6H2O (SPW12)和(C6H9N2O2S)4SiW12O40·5H2O(SSiW12)。 经元素分析、 红外光谱、 核磁共振氢谱、 热重表征， 确定了标题配合物的结构组成。 X射线粉末衍射表明， 标题配合物具有新的物相结构， 为未见文献报道的杂多化合物； 紫外光谱说明， 配合物中磺胺阳离子与杂多阴离子之间存在电荷转移作用； 热重-差示扫描量热分析结果显示2个标题配合物失重均分4步进行， 分别在272.8 ℃和330.4 ℃开始分解。 抗菌实验表明， 标题配合物均具有优良的抗菌活性， 其中SPW12对大肠杆菌、 金黄色葡萄球菌的抑菌率分别达73.28%和99.36%。

Two charge transfer complexes of heteropolytungstate with Keggin structure, (C6H9N2O2S)3PW12O40·6H2O (SPW12) and (C6H9N2O2S)4SiW12O40·5H2O (SSiW12) were synthesized with 12-tungstophosphoric (silicic) acid and sulfanilamide in aqueous phase. The title complexes were characterized by means of elementary analysis, FTIR, UV, 1H NMR, XRD and TG-DSC. The results indicate that the title complexes are new heteropoly compounds, and the UV results reveal that there is a charge transfer interaction between sulfanilamide and heteropoly anion. Thermal analysis shows that the process of mass loss of the title complexes is carried out in four stages, and the two complexes begin to decompose at 272.8 ℃ and 330.4 ℃, respectively. The intermediates of the thermal decomposition were identified by FTIR. Antibacterial test results show that the title complexes both have good antibacterial activity, and the inhibition rate of SPW12 to Escherichia coli, Staphylococcus aurous is 73.28% and 99.36%, respectively.