Loading…
The Temperature Effect on the Transport Properties of 1-Alkyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide Ionic Liquids
The temperature dependences of specific and equivalent conductivities, viscosity, density, and crystallization temperature are determined for three 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([C n MeIm] [Tf 2 N], n = 2, 3, 4) ionic liquids saturated with water vapor at room tempe...
Saved in:
Published in: | Russian Journal of Physical Chemistry A 2018-04, Vol.92 (4), p.724-729 |
---|---|
Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | The temperature dependences of specific and equivalent conductivities, viscosity, density, and crystallization temperature are determined for three 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([C
n
MeIm] [Tf
2
N],
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 (
R
2
> 0.999), and ideal glass transition temperatures
T
0
are calculated for the investigated liquids. The obtained values of
T
0
depend largely on the chosen range of temperatures. It is shown that [C
2
MeIm][Tf
2
N] occupies a separate position with regard to [C
3
MeIm][Tf
2
N] and [C
4
MeIm][Tf
2
N]. |
---|---|
ISSN: | 0036-0244 1531-863X |
DOI: | 10.1134/S0036024418040040 |