ABSTRACT

Densities for solutions of [Cnmim]Br (n = 4, 8, 10, 12) ionic liquids (ILs) in dimethyl sulfoxide (DMSO) have been determined as a function of ionic liquid concentration at the temperature T = (293.15, 298.15, 303.15, 308.15, and 313.5) K and atmospheric pressure. The apparent molar volumes, apparent molar volumes at infinite dilution, and limiting apparent molar expansivities of the ILs have been obtained from the experimental density data. These data were used to understand the effect of the alkyl chain length of the ILs and experimental temperature on the IL DMSO interactions occurring in the studied solutions. It was shown that the apparent molar volumes at infinite dilution increased with increasing alkyl chain length of the ILs and temperature of the systems. Furthermore, the values of the limiting apparent molar expansibilities were found to be positive and decrease with increasing temperature.

Compounds

#	Formula	Name
1	C2H6OS	dimethyl sulfoxide
2	C8H15BrN2	1-butyl-3-methylimidazolium bromide
3	C12H23BrN2	1-methyl-3-octylimidazolium bromide
4	C14H27BrN2	1-decyl-3-methylimidazolium bromide
5	C16H31BrN2	1-dodecyl-3-methylimidazolium bromide

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	10
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	44
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	44
POMD	1 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	40
POMD	1 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:2	43

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

Apparent Molar Volumes and Expansivities of Ionic Liquids [Cnmim]Br (n = 4, 8, 10, 12) in Dimethyl Sulfoxide

Wang, H.[Huiyong], Wang, J.[Jianji], Zhang, S.[Shibiao]

ABSTRACT