ABSTRACT

Isobaric thermal expansivity ap as a function of temperature and pressure was determined by means of a calorimetric method for a set of ionic liquids with a common cation within the temperature and pressure intervals (278.15 to 348.15) K and (5 to 50) MPa. The selected common cation was 1-butyl-3-methylimidazolium, whereas the chosen anions were tetrafluoroborate, bis(trifluoromethylsulfonyl)imide, hexafluoroantimonate, trifluoromethanesulfonate, and methylsulfate. The results are compared with available literature data, obtained from density measurements. An unusual, negative dependence of ap against temperature was found for all liquids over the whole temperature and pressure interval. The results are discussed in terms of the differences in the chemical nature of the anions.

Compounds

#	Formula	Name
1	C10H15F6N3O4S2	1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
2	C8H15F6N2Sb	1-butyl-3-methylimidazolium hexafluoroantimonate
3	C9H15F3N2O3S	1-butyl-3-methylimidazolium trifluoromethanesulfonate
4	C8H15BF4N2	1-butyl-3-methylimidazolium tetrafluoroborate
5	C9H18N2O4S	1-butyl-3-methylimidazolium methyl sulfate

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	Phase	Method	#Points
POMD	1	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Micro DSCII	80
POMD	2	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Micro DSCII	80
POMD	3	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Micro DSCII	80
POMD	4	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Micro DSCII	80
POMD	5	Isobaric coefficient of expansion, 1/K ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Micro DSCII	80

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Isobaric Thermal Expansivity for Ionic Liquids with a Common Cation as a Function of Temperature and Pressure

Navia, P.[Paloma], Troncoso, J.[Jacobo], Romani, L.[Luis]

ABSTRACT