Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Temperature and pressure dependence of the electrical conductivity of the ionic liquids 1-methyl-3-octylimidazolium hexafluorophosphate and 1-methyl-3-octylimidazolium tetrafluoroborate

Kanakubo, M.[Mitsuhiro], Harris, K. R.[Kenneth R.], Tsuchihashi, N.[Noriaki], Ibuki, K., Ueno, M.[Masakatsu]
Fluid Phase Equilib. 2007, 261, 1-2, 414-420
ABSTRACT
The electrical conductivities ( E) of the ionic liquids 1-methyl-3-octylimidazolium hexafluorophosphate [OMIM]PF6, and 1-methyl-3- octylimidazolium tetrafluoroborate [OMIM]BF4, have been measured between 0 and 80 .C and at pressures to a maximum of 196MPa. The temperature and pressure dependence of the conductivities are well represented by modified Litovitz and Vogel-Fulcher-Tammann (VFT) equations as is the case for the viscosity. The molar conductivity ( (C)) is found to follow the fractional form of the Stokes.Einstein relationship with the viscosity ( (C)T) a(T/ A)t, with t = 0.96 for [OMIM]PF6 and t = 0.94 for [OMIM]BF4, independent of both temperature and pressure.
Compounds
# Formula Name
1 C12H23F6N2P 1-octyl-3-methylimidazolium hexafluorophosphate
2 C12H23BF4N2 1-methyl-3-octylimidazolium tetrafluoroborate
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Electrical conductivity, S/m ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 54
  • POMD
  • 1
  • Electrical conductivity, S/m ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 25
  • POMD
  • 2
  • Electrical conductivity, S/m ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 54
  • POMD
  • 2
  • Electrical conductivity, S/m ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 27