摘要
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.
The potassium and TMA salts of trititanium-substituted polyoxoanions A-α and A-β-[SiW9Ti3O40]10-have been synthesized from their lacunary precursors α- and β-SiW9O3410-, and characterized by elemental analysis, IR, UV, Electrochemistry and 183W NMR. 183W NMR spectra of the title anions consist of two lines (intensity ratio 2 : 1) as expected for the C3v structures of the trisubstituted A-α-and A-β-Keggin anions. The title heteropolyanions have the ability of catalyzing the epoxidation of olefin by PhIO.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1995年第1期46-49,共4页
Acta Chimica Sinica
基金
国家自然科学基金资助的项目
