摘要
采用反气相色谱法研究了343.15 ～ 373.15 K温度范围内离子液体1-己基-3-甲基咪唑三氟甲磺酸盐（[HMIM] OTF）的热力学参数.根据18种探针溶剂的保留时间计算出探针溶剂与[HMIM] OTF之间的摩尔吸附焓、无限稀释的摩尔混合焓、摩尔蒸发焓、质量部分活度系数、Flory-Huggins相互作用参数及[HMIM] OTF的溶解度参数.结果表明,所选溶剂中正构烷烃、四氢呋喃、乙醚、环己烷和苯为[HMIM] OTF的不良溶剂;二氯甲烷、丙酮、氯仿、乙酸乙酯、四氯化碳、乙酸甲酯、甲苯和甲醇为[HMIM] OTF的良溶剂;运用外推法得到了室温（298.15K）时[HMIM] OTF的溶解度参数为20.74 （J/cm3）0.5.本研究为离子液体的应用及相关工作提供了参考.
The thermodynamic parameters of ionic liquid l-hexyl-3-methylimidazolium triflu- oromethansulfonate （[ HMIM ] OTF） were investigated by inverse gas chromatography in the temperature range of 343. 15-373. 15 K. Eighteen probe solvents were used to calculate the molar enthalpy of sorption, molar enthalpy of mixing at infinite dilution, molar enthalpy of vaporization and the mass fraction activity coefficients. Furthermore, Flory-Huggins interaction parameters, the solubility parameter of the ionic liquid were calculated to judge the interactions between [ HMIM ]0TF and the 18 probes solvents. The results showed that among the selected solvents, n-C6-9, tetrahydrofuran, diethyl ether, cyclohexane and benzene are the poor sol- vents for [ HMIM ] OTF, while dichloromethane, acetone, chloroform, ethyl acetate, carbon tetrachloride, methyl acetate, toluene and methanol are the favorite solvents for [ HMIM]OTF. In addition, the solubility parameter of [ HMIM ]0TF at room temperature （ 298. 15 K） , which was obtained by linear extrapolation method, was 20.74 （J/cm3）0.5. This study could be used as a reference to the application and research of the ionic liquids.
出处
《色谱》
CAS
CSCD
北大核心
2014年第2期169-173,共5页
Chinese Journal of Chromatography
基金
国家自然科学基金项目(21366029)
