A role of ionic liquid as an activator for efficient olefin epoxidation catalyzed by polyoxometalate
文献类型：期刊论文
| 作者 | Liu, Lili1; Chen, Chuncheng1; Hu, Xuefeng1; Mohamood, Tariq1; Ma, Wanhong1; Lin, Jun2; Zhao, Jincai1 |
| 刊名 | NEW JOURNAL OF CHEMISTRY
 |
| 出版日期 | 2008 |
| 卷号 | 32期号:2页码:283-289 |
| ISSN号 | 1144-0546 |
| DOI | 10.1039/b710444h |
| 英文摘要 | Ionic liquid (IL), such as 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), as an activator for the epoxidation of a wide variety of olefins with H2O2 catalyzed by Keggin polyoxometalate [bmim](3)PW12O40 has been demonstrated. Use of IL results both in significant enhancement of TOF and selectivity for olefin epoxidation compared to that of traditional organic solvents, e. g. 289 times TOF and 1.3 times selectivity as found in CH2Cl2 for the epoxidation of cis-cyclooctene. The kinetic P-31 NMR spectra uncover that the active peroxotungstate [PO4{W(O)(O)(2)}(4)](3-) (Venturello complex), contributing to the epoxidation, can be readily generated in the presence of [bmim][PF6]. Furthermore, the counterion such as PF6- and [(CF3SO2)(2)N](-) is evidenced to play a crucial role in the epoxidation of olefin. BF4- as counterion, instead of PF6-, is found to reduce TOF and selectivity for cis-cyclooctene epoxidation dramatically from 289 to less than 1 and from 99% to 12%, respectively. |
| 语种 | 英语 |
| WOS记录号 | WOS:000253014300012 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63887]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhao, Jincai |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Natl Lab Mol Sci, Key Lab Photochem, Beijing 100080, Peoples R China 2.Renmin Univ China, Dept Chem, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Lili,Chen, Chuncheng,Hu, Xuefeng,et al. A role of ionic liquid as an activator for efficient olefin epoxidation catalyzed by polyoxometalate[J]. NEW JOURNAL OF CHEMISTRY,2008,32(2):283-289. |
| APA | Liu, Lili.,Chen, Chuncheng.,Hu, Xuefeng.,Mohamood, Tariq.,Ma, Wanhong.,...&Zhao, Jincai.(2008).A role of ionic liquid as an activator for efficient olefin epoxidation catalyzed by polyoxometalate.NEW JOURNAL OF CHEMISTRY,32(2),283-289. |
| MLA | Liu, Lili,et al."A role of ionic liquid as an activator for efficient olefin epoxidation catalyzed by polyoxometalate".NEW JOURNAL OF CHEMISTRY 32.2(2008):283-289. |
入库方式： OAI收割
来源：化学研究所
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