ABSTRACT

Volumetric and ultrasonic properties of ionic liquids (ILs), 1-butyl-3-methylimidazolium tetrafluoroborate [C4mim][BF4], 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide [C4mim] [NTf2] and 1-butyl-3-methylimidazolium methylsulfate [C4mim][C1OSO3] with 1,2-propanediol (1,2-PD) have been investigated using density and speed of sound measurements over the entire composition range at T = (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K. The density values were used to calculate excess molar volume, whereas speed of sound results have been used to calculate deviation in isentropic compressibility. Excess properties have been fitted to the Redlich-Kister polynomial equation to obtain the binary coefficients and the standard deviations. Spectroscopic technique like Fourier transform infrared (FT-IR) has been utilized for analyzing molecular level interaction prevailing between the binary mixtures. FT-IR technique has been used to scrutinize the -OH interactions between the binary mixtures and the influence on the structural variations in the ionic liquid. The excess properties and spectroscopic data have been analyzed in terms of the effect of temperature and the change of the anion of ionic liquid.

Compounds

#	Formula	Name
1	C8H15BF4N2	1-butyl-3-methylimidazolium tetrafluoroborate
2	C10H15F6N3O4S2	1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
3	C9H18N2O4S	1-butyl-3-methylimidazolium methyl sulfate
4	C3H8O2	1,2-propanediol

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	Vibrating tube method	6
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	6
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	6
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	6
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	6
POMD	4 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	60
POMD	4 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	60
POMD	4 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	60
POMD	4 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	60
POMD	4 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	60
POMD	4 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	60

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Volumetric, ultrasonic and spectroscopic (FT-IR) studies for the binary mixtures of imidazolium based ILs with 1,2-propanediol

Pal, A.[Amalendu], Saini, M.[Mohit], Kumar, B.[Bhupinder]

ABSTRACT