The cooperative role of zwitterions and phosphotungstate anion in epoxidation reaction

被引：10

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

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2013年 / 380卷

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

Zwitterion; Phosphotungstate; Epoxidation; Surfactant; Emulsion; PHASE-TRANSFER CATALYST; HYDROGEN-PEROXIDE; ALLYLIC ALCOHOLS; HETEROPOLYPEROXO-TUNGSTATES; EFFICIENT EPOXIDATION; HIGHLY EFFICIENT; OXIDATION; OLEFINS; POLYOXOMETALATE; ALKENES;

D O I：

10.1016/j.molcata.2013.09.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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.

引用

页码：43 / 48

页数：6

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