Deng Lishuang, Wang Qiang, Zhang Zhengfang, Tang Jun
Se Pu. 2014 Feb;32(2):169-73. doi: 10.3724/sp.j.1123.2013.10006.
The thermodynamic parameters of ionic liquid 1-hexyl-3-methylimidazolium trifluoromethansulfonate ([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] OTF 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 solvents 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] OTF 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.
采用反相气相色谱法在343.15 - 373.15 K温度范围内研究了离子液体1-己基-3-甲基咪唑三氟甲磺酸盐（[HMIM]OTF）的热力学参数。使用18种探针溶剂计算了吸附摩尔焓、无限稀释混合摩尔焓、汽化摩尔焓和质量分数活度系数。此外，计算了Flory-Huggins相互作用参数和离子液体的溶解度参数，以判断[HMIM]OTF与18种探针溶剂之间的相互作用。结果表明，在所选择的溶剂中，正己烷 - 壬烷、四氢呋喃、乙醚、环己烷和苯是[HMIM]OTF的不良溶剂，而二氯甲烷、丙酮、氯仿、乙酸乙酯、四氯化碳、乙酸甲酯、甲苯和甲醇是[HMIM]OTF的良好溶剂。此外，通过线性外推法得到的[HMIM]OTF在室温（298.15 K）下的溶解度参数为20.74（J/cm³）⁰.⁵。该研究可为离子液体的应用和研究提供参考。
