ABSTRACT

Electrical conductivity of six binary liquid mixtures of 1,3-disubstituted and 1,2,3-trisubstituted imidazolium based ionic liquids (ILs) with bis(trifluoromethylsulfonyl)imide anion with .gamma.-butyrolactone (GBL) was measured at temperatures from (293.15 to 323.15) K and at atmospheric pressure (p = 0.1 MPa) over the whole composition range. The effects of the temperature and IL concentration on the electrical conductivity were systematically investigated. Values of the electrical conductivity were correlated using Casteel-Amis and Arrhenius equations. Molar conductivity was calculated and temperature dependance were fitted applying the Vogel-Fulcher-Tammann equation. Several semi-empirical models (quasi-Arrhenius and Bahe-Varela model) were also tested to correlate the electrical conductivity. The effect of the alkyl chain length and the influence of C-2 methylation of the imidazolium cation on the electrical conductivity features of six different binary mixtures were evaluated.

Compounds

#	Formula	Name
1	C12H19F6N3O4S2	1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide
2	C14H23F6N3O4S2	1-octyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide
3	C9H13F6N3O4S2	1-ethyl-2,3-dimethylimidazolium bis[(trifluoromethyl)sulfonyl]imide
4	C10H15F6N3O4S2	1,2-dimethyl-3-propylimidazolium bis[(trifluoromethyl)sulfonyl]imide
5	C8H11F6N3O4S2	1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide
6	C11H17F6N3O4S2	1-butyl-2,3-dimethyl-1H-imidazolium bis(trifluoromethylsulfonyl)amide
7	C4H6O2	.gamma.-butyrolactone

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 Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	7
POMD	2	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	7
POMD	3	Electrical conductivity, S/m ; Metastable liquid	Temperature, K; Metastable liquid	Pressure, kPa; Metastable liquid Frequency, MHz; Metastable liquid	Metastable liquid	Alternating current cell with electrodes	7
POMD	4	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	7
POMD	5	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	7
POMD	6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	7
POMD	7 5	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 5; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	84
POMD	7 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	63
POMD	7 2	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	63
POMD	7 3	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	84
POMD	7 4	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	84
POMD	7 6	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 6; Liquid	Pressure, kPa; Liquid Frequency, MHz; Liquid	Liquid	Alternating current cell with electrodes	84

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Effect of the alkyl chain length on the electrical conductivity of six (imidazolium-based ionic liquids + .gamma.-butyrolactone) binary mixtures

Papovic, S.[Snezana], Gadzuric, S.[Slobodan], Bester-Rogac, M.[Marija], Vranes, M.[Milan]

ABSTRACT