ABSTRACT

Here we presented the heat capacities and electrical conductivities of four [Bmim (1-n-butyl-3- methylimidazolium)]-based ionic liquids. The heat capacitieswere measured using a differential scanning calorimeter in the temperature range from 303.2 to 358.2 K. The electrical conductivities were measured over temperature range from 293.2 to 353.2K using conductivity meter. The estimated uncertainties of heat capacity Cp and electrical conductivity measurements were +-2% and +-1%, respectively. The measurements were presented as a function of temperature. The temperature dependency of the Cp value was correlated using an empirical equation. A modified version of Vogel Tamman Fulcher equation was employed to describe the temperature dependency of values. The correlations give satisfactory results. The presented results were in good agreement with the available literature data.

Compounds

#	Formula	Name
1	C8H15BF4N2	1-butyl-3-methylimidazolium tetrafluoroborate
2	C8H15F6N2P	1-butyl-3-methylimidazolium hexafluorophosphate
3	C9H18N2O4S	1-butyl-3-methylimidazolium methyl sulfate
4	C9H15F3N2O3S	1-butyl-3-methylimidazolium trifluoromethanesulfonate

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	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	12
POMD	1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	conductivity meter	11
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	12
POMD	2	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	conductivity meter	11
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	12
POMD	3	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	conductivity meter	11
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	12
POMD	4	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	conductivity meter	11

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Heat capacities and electrical conductivities of 1-n-butyl-3-methylimidazolium-based ionic liquids

Yu, Y.-H.[Ya-Hung], Soriano, A. N.[Allan N.], Li, M.-H.[Meng-Hui]

ABSTRACT