文献类型：期刊文献

英文题名：Does the ethanolammonium acetate ionic liquid mix homogeneously with molecular solvents?

作者：Zhu, Xiao[1];Zhang, Huan[1];Xu, Yingjie[2]

机构：[1]Qufu Normal Univ, Sch Chem & Chem Engn, Qufu 273165, Peoples R China;[2]Shaoxing Univ, Dept Chem, Shaoxing 312000, Peoples R China

年份：2016

卷号：54

期号：3

起止页码：205

外文期刊名：MAGNETIC RESONANCE IN CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000370049300002)、、EI(收录号：20232414239382)、Scopus(收录号：2-s2.0-84958759052)、WOS

基金：This work was supported by the National Natural Science Foundation of China (No. 21206085 and 21406140) and Shandong Provincial Doctoral Foundation (No. BS2011CL023).

语种：英文

外文关键词：ammonium-based ionic liquids; local composition model; H-1 NMR chemical shifts; binary solutions

外文摘要：In order to study micro-structural heterogeneities in the solutions of ionic liquids (ILs), ethanolammonium acetate (EOAA) IL has been synthesized and H-1 NMR spectra of its binary solutions, namely EOAA/DMSO and EOAA/n-butanol, have been measured at 298.15K. Then the concentration-dependent chemical shifts (?CH3, EOAA), (?CH3, DMSO) and (?CH3, n-butanol) have been correlated separately using the local composition (LC) model. The results indicated that self-association of EOAA played the leading role within EOAA-rich region in mixtures. However with the molecular solvents increasing, the interactions between EOAA and solvents gradually predominated. Moreover the comparisons between DMSO and n-butanol have demonstrated that DMSO could break the network of IL more easily, indicating that the influence of DMSO on the properties of EOAA should be more obvious, which was consistent with experimental results of viscosity and conductivity. Furthermore the maximum difference between the local and the bulk appeared at x(EOAA)approximate to 0.5 for both systems, which reflected remarkable nonideality of mixtures at this concentration. Copyright (c) 2015 John Wiley & Sons, Ltd.