title: Micellization of long-chain ionic liquids in deep eutectic solvents.
abstract: The aggregation behavior of the ionic liquid (IL) 1-alkyl-3-methylimidazolium chloride with different alkyl chain lengths in a deep eutectic solvent (DES, composed of choline chloride and glycerol in a 1 : 2 mole ratio) was studied for the first time. The critical micellar concentration, micellar size and intermolecular interactions in IL/DES solutions were investigated by different techniques including the fluorescence probe technique, small angle X-ray scattering and Fourier transform infrared spectroscopy. The solvophobic effect dominates the micellization of CnmimCl in DES and the intermolecular hydrogen-bond interaction plays a positive role to promote micelle formation. The micellar solutions were utilized for the synthesis of the water-unstable metal-organic framework Cu3(BTC)2 (BTC = 1,3,5-benzenetricarboxylate) at room temperature. X-Ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption isotherms confirm the formation of crystalline Cu3(BTC)2 nanocrystals with mesoporous structures. The morphologies and porosity properties of Cu3(BTC)2 nanocrystals can be modulated by varying the concentration of CnmimCl.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. zhangjl@iccas.ac.cn.
authors.forename: Xiuniang
authors.initials: X
authors.lastname: Tan
authors.forename: Jianling
authors.initials: J
authors.lastname: Zhang
authors.forename: Tian
authors.initials: T
authors.lastname: Luo
authors.forename: Xinxin
authors.initials: X
authors.lastname: Sang
authors.forename: Chengcheng
authors.initials: C
authors.lastname: Liu
authors.forename: Bingxing
authors.initials: B
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Peng
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Buxing
authors.initials: B
authors.lastname: Han