Synthesis, characterization and thermophysical properties of ionic liquid N-methyl-N-(2′,3′-epoxypropyl)-2-oxopyrrolidinium chloride and its binary mixtures with water or ethanol at different temperatures
Synthesis, characterization and thermophysical properties of ionic liquid N-methyl-N-(2′,3′-epoxypropyl)-2-oxopyrrolidinium chloride and its binary mixtures with water or ethanol at different temperatures
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DOI：
10.1016/j.molliq.2016.03.080
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发表时间：
2016-07
影响因子：
6
通讯作者：
A. Vasanthakumar;I. Bahadur;G. Redhi;R. M. Gengan;K. Anand
中科院分区：
文献类型：
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作者：
A. Vasanthakumar;I. Bahadur;G. Redhi;R. M. Gengan;K. Anand
合成了一种新型离子液体N-甲基-N-(2‘，3’-环氧丙基)-2-氧代吡咯烷氯[EPMPYR]+[Cl]−，并用核磁共振、红外光谱、元素分析等手段对其进行了表征。用卡尔-费雪滴定法测定了离子液体的水分含量。在此基础上，测量了上述离子液体及其相应的水和乙醇二元体系在(293.15~313.15)K不同温度下的密度ρ和声速u，分别从声密度和声速数据研究了超额摩尔体积、V m E等熵压缩系数κS和等熵压缩系数偏差ΔκS等热力学性质。结果表明，随着温度的升高，离子液体及其二元混合物的声速和密度降低，而过量摩尔体积、等熵压缩系数和等熵压缩系数偏差增大。导出的性质，如过剩摩尔体积和等熵压缩数据的偏差，被拟合到Redlich-Kister多项式方程。测量和计算的数据根据分子间界面和相似和不同分子之间的结构效应对混合进行了解释。
A novel ionic liquid, namely, N-methyl-N-(2′, 3′-epoxypropyl)-2-oxopyrrolidinium chloride [Epmpyr]+[Cl]− was synthesized and characterized by different techniques such as NMR (1 H and 13 C), FTIR, and elemental analysis. The water content of the ionic liquid was checked by Karl Fisher titration. Further, the density, ρ, and speed of sound, u, were measured for the above ionic liquid and the corresponding binary systems with water or ethanol at different temperatures ranging from (293.15 to 313.15) K. The derived thermodynamic properties for instance excess molar volumes, V m E isentropic compressibility, κ s, and deviation in isentropic compressibility, Δ κ s, were investigated from the density and speed of sound data, respectively. It is noted that density and speed of sound of the ionic liquid and its binary mixtures were decreased with increase in temperature, whereas excess molar volume, isentropic compressibility, and deviation in isentropic compressibility values increased. Derived properties such as excess molar volumes, and deviation in isentropic compressibility data were fitted to the Redlich-Kister polynomial equation. The measured and calculated data were interpreted in terms of intermolecular interfaces and structural effects between similar and dissimilar molecules upon mixing.