氯化胆碱
共晶体系
水溶液
乙二醇
折射率
离子液体
化学
分析化学(期刊)
氯化物
深共晶溶剂
大气温度范围
摩尔体积
离子键合
热力学
材料科学
离子
色谱法
有机化学
光电子学
合金
物理
催化作用
作者
Rhoda B. Leron,Allan N. Soriano,Menghui Li
标识
DOI:10.1016/j.jtice.2012.01.007
摘要
Deep eutectic solvents (DES) are new emerging alternatives to conventional ionic liquids that may find a number of interesting applications in industrial and chemical processes. In this study, the densities, ρ, and refractive indices, nD, of the DESs (choline chloride + ethylene glycol) and (choline chloride + glycerol) and their aqueous mixtures were investigated at atmospheric pressure over the temperature range 298.15–333.15 K and across a complete composition range. The excess molar volumes, VE, and refractive index deviations, ΔnD, were also calculated from experimental results. The calculated excess molar volumes were negative at all temperatures over the entire range of composition considered, suggesting the presence of strong interactions between water and the DES in the mixtures. The refractive index deviations, on the other hand, were found positive in the entire concentration range. The calculated properties were fitted to a Redlich–Kister type equation to correlate them to the temperature and composition. The correlations used satisfactorily represent the densities and refractive indices of the pure DESs and their aqueous binary mixtures as functions of temperature and composition as indicated by the low overall average absolute deviations obtained in the calculations.
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