摘要
在干燥高纯氩气氛的手套箱内, 直接将摩尔比为1:1的高纯无水InCl 3 与氯化1-甲基-3-丁基咪唑(BMICl)混合, 得到无色透明的离子液体BMIInCl 4. 在278.15～343.15 K温度范围内测定了该离子液体的密度和表面张力. 利用Glasser经验方程和空隙模型讨论了BMIInCl 4的性质, 并与离子液体BMIAlCl 4作了比较, 证明了空隙模型具有一定的合理性.
Recently, ionic liquids （ILs） have received more attention because of their unusual properties and have great potential as “green” solvents for industrial processes. In particular, the ILs based on AlCl3 have been most widely studied. However, there are a limited number of reports of ionic liquids based on elements of group Ⅲ other than aluminum. To expand our knowledge of IL chemistry and as a continuation of our previous investigations this paper reports that an ionic liquid（IL） , BMIInCl4, was prepared by directly mixing InCl3 and 1- methyl-3-n-butylimidazolium chloride with molar ratio 1： 1 under dry argon atmosphere. The densities and surface tension of the pure IL were determined in the temperature range from 278.15 to 343.15 K. The properties for the ionic liquid based on group Ⅲ were discussed by using Glasser＇s theory. The values of volume of anion AlCl4^- and InCl4^- were obtained, respectively. The mean contribution of per methylene （-CH2-） group to the molecular volume of ionic liquid based on AlCl3 is 0. 028 6 nm^3 and is in good agreement with the contribution of 0. 028 0 nm^3 from n-alcohols. And the standard entropy, the surface energy and the crystal energy of the ionic liquid were calculated, respectively. The crystal energy of the ionic liquid is much lower than that of ionic solid and this is the underlying reason for forming ionic liquid at room temperature. In addition, a new theoretical model of ionic liquid, that is an interstice model, was applied to calculating the thermal expansion coefficient of BMIInCl4. And the magnitude order of the thermal expansion coefficient, α, calculated by the theoretical model is in good agreement with the experimental value. The result shows that there is much reasonableness for the interstice model of ionic liquid.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第10期1873-1876,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20473036)资助.
作者简介
联系人简介：杨家振（1940年出生），男，教授，从事溶液化学和离子液体研究。E-mail：jzyanglnu@yahoo．com.cn
