Solubilities and Thermodynamic Study of Carbon Tetrachloride in Imidazolium Ionic Liquids at Different Temperatures
Solubilities and Thermodynamic Study of Carbon Tetrachloride in Imidazolium Ionic Liquids at Different Temperatures
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DOI：
10.1021/je4006008
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发表时间：
2014-02
影响因子：
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通讯作者：
Jun Zhang;H. Yao;Chengxuan Li;Xigang Du;X. Bai;Jing Li;Junna Liu
中科院分区：
文献类型：
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作者：
Jun Zhang;H. Yao;Chengxuan Li;Xigang Du;X. Bai;Jing Li;Junna Liu
用双液相等温平衡法测定了四氯化碳在四种咪唑离子液体(1-丁基-3-甲基咪唑双(三氟甲基磺酰亚胺)、1-丁基-3-甲基咪唑二氰胺([Bmim][N(CN)2])、1-丁基-3-甲基咪唑六氟磷酸盐([Bmim][PF6])和1-丁基-3-甲基咪唑四氟硼酸盐([Bmim][BF4])中的溶解度。提出了一个经验方程来关联溶解度数据与温度。根据溶解度计算结果，估算了ΔGsθ，ΔHSθ和ΔSSθ的溶解热力学函数变化。通过对CCl4的极性、空间位阻和与阴离子的相互作用能的计算和分析，讨论了离子液体对CCl4的溶解能力顺序，并提出了溶解机理和溶解驱动力。
Solubilities of carbon tetrachloride in four imidazolium ionic liquids including 1-butyl-3-methyl imidazolium bis(trifluoromethyl sulfonyl) imide ([Bmim][NTf2]), 1-butyl-3-methyl imidazolium dicyanamide ([Bmim][N(CN)2]), 1-butyl-3-methyl imidazolium hexafluorophosphate ([Bmim][PF6]), and 1-butyl-3-methyl imidazolium tetrafluoroborate ([Bmim][BF4]) have been experimentally determined using the double-liquid phase isothermal equilibrium method in the temperature range from (298.15 to 318.15) K and at ambient pressure. An empirical equation was proposed to correlate the solubility data with temperatures. The dissolving thermodynamic function variations involving ΔGsθ, ΔHsθ, and ΔSsθ have been evaluated based on the solubility results. Through the calculation and analysis for polarity, steric hindrance, and interaction energy of CCl4 with the anions, the sequence of dissolving ability of the ionic liquids for CCl4 was discussed, and a dissolution mechanism as well as dissolution driving force have been sugges...