【摘要】 合成了过氧钛钨硅杂多酸盐α-M_6-mH_m[SiW₁₁（TiO₂）O₃₉]·xH₂O和α-M_10-mH_m[SiW₉（TiO₂）₃O₃₇]·xH₂O（M=K,TBA）,用IR,UV吸收光谱,极谱-循环伏安,¹⁸³W NMR,XPS和XRD等测试方法对其性质、结构进行研究.结果表明,它们都是具有Keggin结构的过氧杂多配合物,TiO₂基团的引人将其极谱半波电位提高至-0.3V以上,它们对顺丁烯二酸的H₂O₂环氧化反应具有显著高的催化活性.更多还原

【Abstract】 Six new complexes a-M6-mHm[SiW11(TiO2)O39]·xH2O, a - M10 -m Hm [ SiW9(TiO2)3O37]·xH2O and a-M6-mHm[SiW11TiO40]·xH2O(M=K,TBA) were synthesized and characterized by IR and UV spectroscopy,polarography and cyclic voltammetric,183W NMR,XPS and XRD methods. The experimental results indicate that they are all the Keggin structure and the reduced electric potential of the complexes arise over - 3.0V with entering of TiO2 groups. This complexes had high activity for the epoxidation of Maleic acid using H2O2 oxidant.更多还原