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本文报道了α-和β-[SiW_9Ti_3O_(40)]~(10-)杂多阴离子的钾盐、四甲基铵盐的合成及其~(183)W NMR表征、~(183)W NMR谱中有两个峰,相对强度为2:1,表明其阴离子分别为A型α一和β一Keggin结构,即三个TiO_6八面体是角顶共用.合成化合物具有催化PhIO环氧化烯烃的性质.
In this paper, the synthesis and characterization of potassium and tetramethylammonium salts of α- and β- [SiW_9Ti_3O_ (40)] ~ (10-) heteropolyanions have been reported. The ~ (183) W NMR spectra In the two peaks, the relative intensity of 2: 1, indicating that their anions were α-type α and β-Keggin structure, that is, three TiO_6 octahedron is the corner of the common synthetic compounds have the nature of catalytic PhIO epoxidation of olefins .