Further understanding of the multiple equilibria interaction pattern   between ionic liquid and beta-cyclodextrin

doi:10.1007/s10847-013-0354-6

CORC > 北京大学 > 化学与分子工程学院

	Further understanding of the multiple equilibria interaction pattern between ionic liquid and beta-cyclodextrin
	Zhang, Jingjing ; Shi, Jianfeng ; Shen, Xinghai
刊名	包含现象与大环化学杂志
	2014
关键词	Cyclodextrin Ionic liquid Tf2N- Inclusion complex Multiple equilibria INCLUSION COMPLEXES AQUEOUS-SOLUTIONS 3H-INDOLE ENCAPSULATION RECOGNITION CATALYSIS ROTAXANE PROBE
DOI	10.1007/s10847-013-0354-6
英文摘要	The interactions of the ionic liquids 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C (n) mimTf(2)N, n = 2, 4, 6, 8, 10, 12) with beta-cyclodextrin (beta-CD) in aqueous solutions are investigated in this work. The stoichiometry and apparent association constants are obtained by competitive fluorescence method and isothermal titration calorimetry (ITC). The results show that C(2)mimTf(2)N, C(4)mimTf(2)N, and C(6)mimTf(2)N mainly form 1:1 (guest:host) inclusion complexes with beta-CD, whereas C(8)mimTf(2)N, C(10)mimTf(2)N, and C(12)mimTf(2)N form both 1:1 and 1:2 inclusion complexes, the latter of which are mainly attributed to the formation of the C (n) mim(+)-2 beta-CD complexes. Besides, Tf2N- only forms the 1:1 complex with beta-CD owing to a charge resonance structure that breaks the symmetry of the structure of Tf2N-, which is proved by Fourier transform infrared spectra. The thermodynamic parameters obtained by ITC reveal that the formation of the inclusion complexes are enthalpy-controlled for C(2)mimTf(2)N, C(4)mimTf(2)N, and C(6)mimTf(2)N, while for the C(8)mimTf(2)N/beta-CD system, the process becomes entropy and enthalpy driven. Based on high-resolution mass spectrometry used with electrospray ionization results, the interaction between C (n) mimTf(2)N and beta-CD is found to follow the multiple equilibria interaction pattern which was suggested in our previous work.; Chemistry, Multidisciplinary; SCI(E); 2; ARTICLE; xshen@pku.edu.cn; 3-4; 319-327; 79
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150440]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Jingjing,Shi, Jianfeng,Shen, Xinghai. Further understanding of the multiple equilibria interaction pattern between ionic liquid and beta-cyclodextrin[J]. 包含现象与大环化学杂志,2014.
APA	Zhang, Jingjing,Shi, Jianfeng,&Shen, Xinghai.(2014).Further understanding of the multiple equilibria interaction pattern between ionic liquid and beta-cyclodextrin.包含现象与大环化学杂志.
MLA	Zhang, Jingjing,et al."Further understanding of the multiple equilibria interaction pattern between ionic liquid and beta-cyclodextrin".包含现象与大环化学杂志 (2014).