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Pulse radiolysis studies of functionally substituted imidazolium-based ionic liquids
Fu, HY(付海英); Xing, ZG; Cao, XY; Wu, GZ(吴国忠)
2012
Source PublicationCHINESE SCIENCE BULLETIN
ISSN1001-6538
Volume57Issue:21
AbstractThe reactions of imidazolium-based ionic liquids having different substituent groups on the ring with hydrated electrons (e (aq) (-) ), hydroxyl radicals ((OH)-O-aEuro cent), and sulfate anion radicals (SO (4) (aEuro cent a') ) were investigated using nanosecond pulse radiolysis techniques. The spectra of these ionic liquids on reaction with e(aq) (-) all exhibited a similar peak at about 320 nm, and a typical peak for e (aq) (-) in aqueous ionic liquid solutions. The reaction rate constants for 1,3-disubstituted imidazolium-based ionic liquid hexafluorophosphates (BMIPF6) with e(aq) (-) were deduced to be 10(10) L mol(-1) s(-1), however the values were lower for trisubstituted ionic liquids. For example, the rate constant for 1-butyl-2,3-dimethylimidazolium tetrafluoroborate (BMMIBF4) was 5.5x10(9) L mol(-1) s(-1). Imidazolium-based ionic liquids reacted with hydroxyl radicals via adducts to produce a mixture of isomeric OH adducts, and the pk (a) value of the OH adducts was deduced to be 8.4 +/- 0.4 for 1-butyl-3-methylimdazolium tetrafluoroborate (BMIBF4). Moreover, imidazolium cations were also oxidized by SO4 (aEuro cent a') to produce bivalent cation radicals, which exhibit a peak at 320 nm, and these rate constants are of the same order of magnitude, i.e., 10(9) L mol(-1) s(-1), except that for 1-(2-hydroxyethyl)-3-methylimdazolium tetrafluoroborate with SO4 (aEuro cent a') (k=2.8x10(8) L mol(-1) s(-1)). Theoretical calculations were carried out to estimate the structures of the products of reduction by e(aq) (-1) and the results were related to the experimental data.
Language英语
Funding Project应物所项目组
WOS IDWOS:000306336100017
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13264
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Fu, HY,Xing, ZG,Cao, XY,et al. Pulse radiolysis studies of functionally substituted imidazolium-based ionic liquids[J]. CHINESE SCIENCE BULLETIN,2012,57(21).
APA Fu, HY,Xing, ZG,Cao, XY,&Wu, GZ.(2012).Pulse radiolysis studies of functionally substituted imidazolium-based ionic liquids.CHINESE SCIENCE BULLETIN,57(21).
MLA Fu, HY,et al."Pulse radiolysis studies of functionally substituted imidazolium-based ionic liquids".CHINESE SCIENCE BULLETIN 57.21(2012).
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