醇类氧化反应中杂多酸盐催化剂的光谱研究  

A Spectroscopic Study on Heteropolyphosphatotungstate in The Alcohol Oxidation

作　　者：张生军[1] 赵公大[1] 高爽[1] 奚祖威[1] 徐杰[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《分子催化》2007年第6期499-502,共4页Journal of Molecular Catalysis(China)

摘　　要：一种可回收循环使用的磷钨杂多酸盐(n-C_(16)H_(33)N(CH_3)_3)_3[PW_4O_(16)])应用于醇类的无溶剂催化氧化反应.通过IR和^(31)PNMR光谱对醇氧化反应前后以及反应过程中催化剂的结构变化进行表征分析,得出此催化剂为多种磷钨杂多酸盐的混合物,反应中活性中间体为含活性氧物种,多次反应-分离循环后催化剂活性会逐渐降低,催化剂的结构逐渐变为稳定的keggin结构.The IR and ^31p NMR spectra of heteropoly-phosphatotugstate before, during and after the alcohol oxidation reaction were analysed. It showed that the catalyst was composed of several heteropolyphosphatotugstates, the active intermediate species was polyoxometalte contained active oxygen, the activity of catalyst was lowered gradually and the catalyst converted into steady keggin structure after many reaction-separation cycles.

关 键 词：醇氧化 磷钨杂多酸盐IR ^31P NMR 

分 类 号：O543.32[理学—物理]