有机溶质在双烷烃咪唑醋酸盐离子液体中无限稀释活度系数的测定  

Measurement of infinite dilution activity coefficients for organic solutes in dialkylimidazolium acetate ionic liquids

作　　者：丁珊[1] 魏立纲[1] 王艳涛[1] 王琳琳[1] 

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2016年第1期29-32,共4页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金资助项目(21106011;21276034);辽宁省教育厅科学研究一般项目(L2012195)

摘　　要：用反气相色谱法测定了11种探针溶质323.15～353.15 K内在双烷烃咪唑醋酸盐离子液体（[R1R2IM]OAc）中的无限稀释活度系数。实验结果显示,无限稀释活度系数表现出明显的非理想性,这主要是由于溶质与溶剂之间的相互作用存在强弱差异。温度对无限稀释活度系数有明显影响,温度升高,无限稀释活度系数增大。在一定温度范围内,探针溶质的无限稀释活度系数对数随温度变化的线性拟合结果较好,可以对无限稀释活度系数对数进行适度的内插和外推。离子液体中的阳离子烷基链长度影响无限稀释活度系数。Inverse gas chromatography （IGC） was used to measure the infinite diluted activity coefficients of eleven solutes dialkylimidazolium acetate ILs （[R1R2IM]OAc） at 323.15 to 353.15 K. A non-ideal behavior of the infinite diluted activity coefficients was observed, which mainly came from the interaction between solute and solvent. Temperature had an obvious influence on the infinite diluted activity coefficients, and the value was increased with the increasing temperature. Linear fitting results for the infinite diluted activity coefficients of logarithmic were obtained at the temperature ranging from 323.15 to 353.15 K, which indicated that a moderate amount of interpolation and extrapolation for the infinite diluted activity coefficients of logarithmic could achieve. The alkyl chain length of cation for ILs affected the infinite diluted activity coefficients.

关 键 词：反相气相色谱法 离子液体 无限稀释活度系数 

分 类 号：O642.1[理学—物理化学]