ABSTRACT

Densities and speeds of sound for aqueous solutions of ionic liquids having 1-butyl-3-methylimidazolium as cation and chloride, bromide, iodide, acetate, tetrafluoroborate, and trifluoromethanesulfonate as anions were accurately measured at various concentrations and temperatures. The data were used in evaluating thermodynamic properties as apparent molar volumes and apparent molar isentropic compressions. Infinite dilution values of these properties were determined using appropriate extrapolation procedures utilizing Debye-Huckel limiting law for electrolyte solutions. Apparent molar isobaric expansions at infinite dilutions were also evaluated from the temperature dependence of apparent molar volumes. The results were interpreted in terms of ionic liquid-water interactions.

Compounds

#	Formula	Name
1	H2O	water
2	C8H15ClN2	1-butyl-3-methylimidazolium chloride
3	C8H15BrN2	1-butyl-3-methylimidazolium bromide
4	C8H15IN2	1-butyl-3-methylimidazolium iodide
5	C10H18N2O2	1-butyl-3-methylimidazolium acetate
6	C8H15BF4N2	1-butyl-3-methylimidazolium tetrafluoroborate
7	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	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	5
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	5
POMD	1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	55
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	55
POMD	1 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	55
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	55
POMD	1 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	55
POMD	1 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	55
POMD	1 5	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	55
POMD	1 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	55
POMD	1 6	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	55
POMD	1 6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	55
POMD	1 7	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	55
POMD	1 7	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	55

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Volumetric studies to examine the interactions of imidazolium based ionic liquids with water by means of density and speed of sound measurements

Lal, B.[Bhajan], Sahin, M.[Melike], Ayranci, E.[Erol]

ABSTRACT