Tetrabutylammonium salts of tritransition-metal-substituted A-α-tungstogermanate:Halogen-free and single-component catalysts for the coupling reaction of carbon dioxide and epichlorohydrin  

作　　者：Fa Wang Chen Tao Dong Xiao Fang Li Tie Gang Xu Chang Wen Hu 

机构地区：[1]Key Laboratory of Cluster Science, Ministry of Education of China, Belting Institute of Technology, Beijing 100081, China [2]School of Material Engineering, Jinling Institute of Technology, Nanjing 211169, China

出　　处：《Chinese Chemical Letters》2011年第7期871-874,共4页中国化学快报（英文版）

基　　金：financially supported by the Natural Science Foundation of China(Nos.20731002 and 10876002), the 111 Project(No.B07012);the Program of Cooperation of the Beijing Education Commission(No.20091739006);Specialized Research Fund for the Doctoral Program of Higher Education(No.200800070015);Postgraduate innovative Research Foundation of Beijing Institute of Technology(No.AA200804)

摘　　要：The green synthesis of chloropropylene carbonate via the coupling reaction of carbon dioxide and epichlorohydrin had been achieved using halogen-free and single-component catalysts tetrabutylammonium salts of tritransition-metal-substituted A-α- tungstogermanate [（n-C4H9）4N]3H7GeW9M3（H2O）30O7 （M = Cu^Ⅱ, Ni^Ⅱ, Co^Ⅱ and Mn^Ⅱ） without any solvent. The catalytic activity was significantly depended on the transition metal introduced in polyoxometalates. [（n-C4H9）4N]3H7GeW9Mn3（H2O）3O37 exhibited the highest catalytic activity with 94.9% conversion for epichlorohydrin and 98% selectivity for chloropropylene carbonate in 3 h. Plausible mechanism was proposed based on the results.The green synthesis of chloropropylene carbonate via the coupling reaction of carbon dioxide and epichlorohydrin had been achieved using halogen-free and single-component catalysts tetrabutylammonium salts of tritransition-metal-substituted A-α- tungstogermanate [（n-C4H9）4N]3H7GeW9M3（H2O）30O7 （M = Cu^Ⅱ, Ni^Ⅱ, Co^Ⅱ and Mn^Ⅱ） without any solvent. The catalytic activity was significantly depended on the transition metal introduced in polyoxometalates. [（n-C4H9）4N]3H7GeW9Mn3（H2O）3O37 exhibited the highest catalytic activity with 94.9% conversion for epichlorohydrin and 98% selectivity for chloropropylene carbonate in 3 h. Plausible mechanism was proposed based on the results.

关 键 词：Cyclic carbonate Catalysis Carbon dioxide Polyoxometalates 

分 类 号：TQ426.94[化学工程] TQ223.26