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合成了过氧钛钨硅杂多酸盐α-M_(6-m)H_m[SiW_(11)(TiO_2)O_(39)]·xH_2O和α-M_(10-m)H_m[SiW_9(TiO_2)_3O_(37)]·xH_2O(M=K,TBA),用IR,UV吸收光谱,极谱-循环伏安,~(183)W 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,TiO_2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H_2O_2环氧化反应具有显著高的催化活性.
Α-M_ (6-m) H_m [SiW_ (11) (TiO_2) O_ (39)] xH_2O and α-M_ (10-m) H_m [SiW_9 (TiO_2) _3O_ (37)] · xH_2O (M = K, TBA) were synthesized and characterized by IR, UV absorption spectroscopy, polarography-cyclic voltammetry, ~ (183) W NMR, XPS and XRD. The results showed that all of them were peroxoheptahedral complexes with Keggin structure. The introduction of TiO 2 groups increased the polarographic half-wave potentials to above -0.3V. Their H 2 O 2 epoxidation With significantly higher catalytic activity.