文献类型：期刊文献

英文题名：The cooperative role of zwitterions and phosphotungstate anion in epoxidation reaction

作者：Qiao, Yunxiang[1,2];Hua, Li[1];Chen, Jizhong[1];Theyssen, Nils[2];Leitner, Walter[2,3];Hou, Zhenshan[1]

机构：[1]E China Univ Sci & Technol, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany;[3]Rhein Westfal TH Aachen, Lehrstuhl Tech Chem & Petrolchem, Inst Tech & Makromol Chem, D-52064 Aachen, Germany

年份：2013

卷号：380

起止页码：43

外文期刊名：JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

收录：;EI(收录号：20134316904084);WOS:【SCI-EXPANDED(收录号:WOS:000327686600006)】；

基金：The authors are grateful for the support from the National Natural Science Foundation of China (No. 21073058, 21373082), the Research Fund for the Doctoral Program of Higher Education of China (20100074110014), the Fundamental Research Funds for the Central Universities and China Scholarship Council, as well as the Max Planck Society.

语种：英文

外文关键词：Zwitterion; Phosphotungstate; Epoxidation; Surfactant; Emulsion

摘要：The combination of a certain zwitterion and sodium phosphotungstate provided an excellent catalyst for the epoxidation of cyclooctene: high TON was available even without any solvents and under ice bath condition. Based on characterizations by H-1, C-13 and P-31 NMR as well as FT-IR, Raman and UV-vis methods and investigations on the catalytic performance of the binary system, strong cooperative effect between zwitterions and sodium phosphotungstate was demonstrated. Here, the formation of stable W/O emulsion by the amphiphilic zwitterions seems to be crucial, which allows cyclooctene being in sufficient contact with the active phosphotungstate anions in the water phase. (C) 2013 Elsevier B.V. All rights reserved.