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

作     者：LENG Yan ZHAO PingPing ZHANG MingJue CHEN GuoJian WANG Jun 

作者机构：State Key Laboratory of Materials-Oriented Chemical EngineeringCollege of Chemistry and Chemical EngineeringNanjing University of TechnologyNanjing 210009China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2012年第55卷第9期

页      面：1796-1801页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China (21136005) 

主　　题：hybrid catalyst heteropolyacid ionic liquid oxidation of alcohols heterogeneous catalysis 

摘      要：An ionic hybrid catalyst 1,1＇-（butane- 1,4-diyl）-bis（3-methylimidazolium） phosphotungstate （abbreviated [***） has been prepared by anion-exchange of the divalent ionic liquid （1L） 1,1 ＇-（butane-1,4-diyl）-bis（3-methylimidazolium） di（bromide） with the Keggin phosphotungstic acid H3PW12O40, and characterized by IR, 1H NMR, 13C 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]*** was also compared with related catalysts bearing other cations or anions. The new hybrid [Dmim]1.5PW proved to be an effi- cient liquid-solid heterogeneous catalyst for H2O2-based oxidation of alcohols, with the advantages of high conversion and se- lectivity, easy recovery, and quite good reusability.