A dicationic ionic liquid-modified phosphotungstate hybrid catalyst for the heterogeneous oxidation of alcohols with H_2O_2

查看全文 作　　者：LENG [1]Yan;ZHAO [1]PingPing;ZHANG [1]MingJue;CHEN [1]GuoJian;WANG [1]Jun

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering,Nanjing University of Technology,Nanjing 210009,China

出　　处：《Science China Chemistry》索引2012年第55卷第9期,共6页

基　　金：supported by the National Natural Science Foundation of China (21136005) 摘　　要：An ionic hybrid catalyst 1,1'-(butane-1,4-diyl)-bis(3-methylimidazolium) phosphotungstate(abbreviated [Dmim] 1.5 PW) has been prepared by anion-exchange of the divalent ionic liquid(IL) 1,1'-(butane-1,4-diyl)-bis(3-methylimidazolium) di(bromide) with the Keggin phosphotungstic acid H 3 PW 12 O 40,and characterized by IR,1 H NMR,13 C NMR,ESI-MS,TG,SEM,XRD,BET surface area measurements,elemental analysis,and melting point.The hybrid material was evaluated as a catalyst for the oxidation of alcohols with aqueous hydrogen peroxide under various conditions.The catalytic performance of [Dmim] 1.5 PW was also compared with related catalysts bearing other cations or anions.The new hybrid [Dmim] 1.5 PW proved to be an efficient liquid-solid heterogeneous catalyst for H2O2-based oxidation of alcohols,with the advantages of high conversion and selectivity,easy recovery,and quite good reusability. 关键词：复合催化剂过氧化氢离子液体磷钨酸阳离子 H202 醇液 KEGGIN结构

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A dicationic ionic liquid-modified phosphotungstate hybrid catalyst for the heterogeneous oxidation of alcohols with H_2O_2

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