ICCAS OpenIR
A role of ionic liquid as an activator for efficient olefin epoxidation catalyzed by polyoxometalate
Liu, Lili1; Chen, Chuncheng1; Hu, Xuefeng1; Mohamood, Tariq1; Ma, Wanhong1; Lin, Jun2; Zhao, Jincai1
2008
Source PublicationNEW JOURNAL OF CHEMISTRY
ISSN1144-0546
Volume32Issue:2Pages:283-289
AbstractIonic 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.
DOI10.1039/b710444h
Indexed BySCI ; CCR
Language英语
WOS IDWOS:000253014300012
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63888
Collection中国科学院化学研究所
Corresponding AuthorZhao, Jincai
Affiliation1.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
Recommended Citation
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.
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