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.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2007年第6期499-502,共4页
Journal of Molecular Catalysis(China)
