Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (12): 2762-2766.doi: 10.3866/PKU.WHXB20112762


Dynamic Viscosity and Conductivity of Ionic Liquids [Cnpy][NTf2] (n=2, 4, 5)

LIU Qing-Shan1, YAN Pei-Fang1, YANG Miao1, TAN Zhi-Cheng1,2, LI Chang-Ping1,3, WELZ-BIERMANN Urs1   

  1. 1. China Ionic Liquid Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, LiaoningProvince, P. R. China;
    2. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences,Dalian 116023, Liaoning Province, P. R. China;
    3. College of Chemical Engineering and the Environment, Dalian University,Dalian 116622, Liaoning Province, P. R. China
  • Received:2011-04-20 Revised:2011-09-21 Published:2011-11-25
  • Contact: TAN Zhi-Cheng, LI Chang-Ping;
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21073189, 21006007, 20901076, 21176033) and Knowledge Innovation Program of DICP, Chinese Academic of Sciences (K2009D03).

Abstract: Experimental dynamic viscosity and conductivity data of the air- and water-stable hydrophobic ionic liquids (ILs) N-alkylpyridinium bis(trifluoromethylsulfonyl)imide ([Cnpy][NTf2] n=2, 4, 5) were recorded at temperatures ranging from 298.15 to 338.15 K and from 283.15 to 338.15 K with an interval of 5 K. The dynamic viscosity and conductivity values of the [Cnpy][NTf2] (n=2, 4, 5) ILs were fitted using the Arrhenius equation and the Fulcher equation. The molar conductivity was calculated at temperatures ranging from 283.15 to 338.15 K from the conductivity and density data. The relationship between the dynamic viscosity and the molar conductivity was discussed in terms of Walden's rule.

Key words: Ionic liquids, Dynamic viscosity, Conductivity, Molar conductivity, Walden rule