Interaction between beta-cyclodextrin and ionic liquids in aqueous solutions investigated by a competitive method using a substituted 3H-indole probe

doi:10.1016/j.jphotochem.2008.01.001

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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
刊名	JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
	2008-06-25
卷号	197 期号:2-3 页码:253-259
关键词	Inclusion Complex Ionic Liquid Beta-cyclodextrin Steady-state Fluorescence (19)f Nmr Conductivity
ISSN号	1010-6030
DOI	10.1016/j.jphotochem.2008.01.001
英文摘要	We 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.
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000256780100017
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/63593]
专题	中国科学院化学研究所
通讯作者	Shen, Xinghai
作者单位	Peking Univ, BNLMS, Dept Appl Chem, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
推荐引用方式 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.