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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (16): 1879-1883. 上一篇    下一篇

研究论文

锌基离子液体BMIZn2Cl5的性质研究

WEI, Ying ZHANG, Qing-Guo*

  

  1. (渤海大学化学化工学院 锦州 121000)

  • 投稿日期:2008-01-12 修回日期:2008-02-29 发布日期:2008-08-28
  • 通讯作者: 张庆国

Properties of Ionic Liquid Based on Zinc Chloride BMIZn2Cl5

(College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121000)   

  1. An ionic liquid (IL) based on zinc chloride BMIZn2Cl5 has been synthesized under a dry argon atmosphere. The density and surface tension of the ionic liquid (IL) in a temperature range from 313.15 to 343.15 K were determined. The values of thermal expansion coefficient and surface entropy were estimated by extrapolation. In terms of Glasser’s theory, the standard molar entropy and lattice energy of the BMIZn2Cl5 were estimated. The thermal expansion coefficient, α, calculated by an interstice model is of the same order of magnitude as the experimental value. Using the methods of Kabo and Rebelo, the molar enthalpy of vaporization of the IL, at 298 K and at the hypothetical normal boiling point were estimated.
  • Received:2008-01-12 Revised:2008-02-29 Published:2008-08-28
  • Contact: ZHANG, Qing-Guo

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合成了对水和空气均稳定的锌基离子液体五氯化二锌-1-甲基-3-丁基咪唑(BMIZn2Cl5). 在313.15～343.15 K温度范围内, 测定了离子液体BMIZn2Cl5的密度和表面张力. 拟合并估算了BMIZn2Cl5的恒压热胀系数和表面熵, 并根据Glasser理论和离子液体的空隙模型, 讨论了BMIZn2Cl5的热力学性质, 估算出其晶格能和标准熵 , 计算了离子液体的恒压热胀系数α, 与实验值基本一致, 说明了空隙模型的合理性. 并利用Kabo和Rebelo的方法估算了锌基离子液体BMIZn2Cl5的正常沸点, 蒸气压, 汽化焓( )等性质参数.

关键词: 锌基离子液体, BMIZn2Cl5, 密度, 表面张力, Glasser理论, 空隙模型, 汽化焓

Abstract An ionic liquid (IL) based on zinc chloride BMIZn2Cl5 has been synthesized under a dry argon at-mosphere according to Lecocq’s viewpoint. The density and surface tension of the IL in temperature range from 313.15 K to 343.15 K were determined. The value of thermal expansion coefficient and surface entropy were es-timated by extrapolation. In terms of Glasser’s theory, the standard molar entropy and lattice energy of the BMIZn2Cl5 were estimated. The thermal expansion coefficients,α, calculated by the interstice model is of the same order of magnitude as the experimental value. Using the methods of Kabo and Rebelo, the molar enthalpy of vaporization of the IL, lgHm0 at 298 K and lgHm0 at the hypothetical normal boiling point were estimated.

Key words: ionic liquid based on zinc chloride, BMIZn2Cl5, density, surface tension, Glasser theory, interstice model, molar enthalpy of vaporization