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Interaction between beta-cyclodextrin and ionic liquids in aqueous solutions investigated by a competitive method using a substituted 3H-indole probe
He, Yifeng; Shen, Xinghai
2008-06-25
Source PublicationJOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
ISSN1010-6030
Volume197Issue:2-3Pages:253-259
AbstractWe report herein the interaction of three kinds of ionic liquids, i.e., 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF(6)), 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF(4)) and 1-butyl-3-methylimidazolium chloride (bmimCl) with P-cyclodextrin (P-CD) using 2(p-aminophenyl)-3,3-dimethyl-5-carboethyoxy-3H-indole (1) as a fluorescent probe through a competitive method. The formation of the 1:1 (guest: host) inclusion complex was suggested and the association constants at different temperatures were estimated, from which the thermodynamic parameters Delta G(Theta), Delta H(Theta) and Delta S(Theta) were also obtained. The negative entropy and enthalpy changes indicated that the formation of above inclusion complexes was entropically unfavorable and enthalpy-driven. Conductivity measurements were also employed to study above systems. The results showed agreement with those based on the competitive method. Furthermore, through NMR, the location of anions in the system of ILs and P-CD was investigated. We suggested that the anion was accommodated to a great extent by the cavity forming ion pair with imidazolium cation which was totally in the cavity of beta-CD. The above work demonstrated that molecule 1 is a very sensitive fluorescence probe for studying the interaction of a non-fluorescent guest with cyclodextrins. (c) 2008 Elsevier B.V. All rights reserved.
KeywordInclusion Complex Ionic Liquid Beta-cyclodextrin Steady-state Fluorescence (19)f Nmr Conductivity
DOI10.1016/j.jphotochem.2008.01.001
Indexed BySCI
Language英语
WOS IDWOS:000256780100017
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:43[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63594
Collection中国科学院化学研究所
Corresponding AuthorShen, Xinghai
AffiliationPeking Univ, BNLMS, Dept Appl Chem, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
He, Yifeng,Shen, Xinghai. Interaction between beta-cyclodextrin and ionic liquids in aqueous solutions investigated by a competitive method using a substituted 3H-indole probe[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,2008,197(2-3):253-259.
APA He, Yifeng,&Shen, Xinghai.(2008).Interaction between beta-cyclodextrin and ionic liquids in aqueous solutions investigated by a competitive method using a substituted 3H-indole probe.JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY,197(2-3),253-259.
MLA He, Yifeng,et al."Interaction between beta-cyclodextrin and ionic liquids in aqueous solutions investigated by a competitive method using a substituted 3H-indole probe".JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 197.2-3(2008):253-259.
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