文献类型：期刊文献

英文题名：The local composition behavior in binary solutions of diethylamine acetate ionic liquid

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：213

起止页码：139

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000369462300018)、、EI(收录号：20154801614763)、Scopus(收录号：2-s2.0-84947936499)、WOS

基金：This work was supported by the National Natural Science Foundation of China (Nos. 21206085 and 21406140).

语种：英文

外文关键词：H-1 NMR chemical shifts; Local composition model; Density; Viscosity; Electric conductivity

外文摘要：In order to uncover the micro-structural heterogeneities in the solutions of ammonium-based ionic liquids, diethylamine acetate (DEAA) has been synthesized and concentration-dependent H-1 NMR spectra of three binary solutions, namely DEAA/water, DEAA/DMSO and DEAA/acetone, at different compositions have been measured at 298.15 K. The proton chemical shifts of DEAA have been correlated using the H-1 NMR local composition (LC) model. It has been found that the self-associations of DEAA were predominant instead of DEAA-solvent interactions within DEAA-rich region. However within solvent-rich region, DEAA could mainly interact with solvent molecules, indicating that the network of DEAA has been greatly destroyed by effects of solvents. In addition, the ability of solvents to break down the structure of DEAA followed in such order: water > DMSO > acetone, which was consistent with changes of physicochemical properties of these solutions. (C) 2015 Elsevier B.V. All rights reserved.