The Temperature Effect on the Transport Properties of 1-Alkyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide Ionic Liquids

被引：0
作者：
E. P. Grishina
N. O. Kudryakova
L. M. Ramenskaya
Yu. A. Fadeeva
机构：
[1] Russian Academy of Sciences,Krestov Institute of Solution Chemistry
[2] Ivanovo State University of Chemistry and Technology,undefined
来源：
Russian Journal of Physical Chemistry A | 2018年 / 92卷
关键词：
dialkylimidazolium ionic liquids; electrical conductivity; viscosity; density; temperature dependence; glass transition temperature;
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学科分类号：
摘要：
The temperature dependences of specific and equivalent conductivities, viscosity, density, and crystallization temperature are determined for three 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([CnMeIm] [Tf2N], n = 2, 3, 4) ionic liquids saturated with water vapor at room temperature. It is established that in the area of positive temperatures, the relationship between viscosity and conductivity obeys the fractional Walden rule with exponents of 0.97, 0.92, and 0.92 for ionic liquids with ethyl-, propyl-, butylradicals, respectively. The temperature dependences of conductivity and viscosity are approximated using the Vogel–Fulcher–Tammann equation (R2 > 0.999), and ideal glass transition temperatures T0 are calculated for the investigated liquids. The obtained values of T0 depend largely on the chosen range of temperatures. It is shown that [C2MeIm][Tf2N] occupies a separate position with regard to [C3MeIm][Tf2N] and [C4MeIm][Tf2N].
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页码：724 / 729
页数：5
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