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Citation: TONG Jing, ZHANG Qing-guo, HONG Mei, YANG Jia-zhen. Thermodynamic Properties of Ionic Liquid BMIAlCl₄[J]. Acta Physico-Chimica Sinica, ;2006, 22(01): 71-75. doi: 10.3866/PKU.WHXB20060114 shu

Thermodynamic Properties of Ionic Liquid BMIAlCl₄

1.
College of Chemistry, Liaoning University, Shenyang 110036, P. R. China; The Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 1 June 2005
Available Online: 15 January 2006

An ionic liquid (IL) has been prepared by directly mixing AlCl₃ and 1-methyl-3-butylimidazolium chloride (BMIC) with molar ratio 1/1 under dry ar n atmosphere. The densities and surface tensions of the pure IL were determined in the temperature range of (278.2±0.1) to (343.2±0.1) K. The properties for the ionic liquid were discussed in terms of Glasser′s empirical model. The values of volume of anion AlCl₄^{- were obtained. The mean contribution of per methylene (CH₂) group to standard entropy of the IL is 35.2 J•K^-1•mol^-1 and is in od agreement with contribution of 35.1 J•K^-1•mol^-1 from [Cn-min][NTf₂]. The crystal energy of the IL is much lower than that of ionic solids, which is the main reason for the liquid state of the IL at room temperature. In addition, the interstice model was applied to calculate the thermal expansion coefficient of the IL, and the result agrees reasonably with the experimental value.}
- Ionic liquid;Density;Surface tension;AlCl₃;Interstice model;Glasser′s theory
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沈阳化工大学材料科学与工程学院沈阳 110142

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Thermodynamic Properties of Ionic Liquid BMIAlCl₄