ABSTRACT

The aggregation behavior of three 1-alkyl-3-methylimidazolium chloride ionic liquids, [CnC1im]Cl (with n = 8, 10, 12), was probed at atmospheric pressure using density and speed of sound measurements in the 283.15 greater than T/K greater than 313.15 temperature range in aqueous solutions with mole fraction ranges of 0 greater than x([C8C1im]- Cl) greater than 58 10 4, 0 greater than x([C10C1im]Cl) greater than 20 10 4, and 0 greater than x([C12C1im]Cl) greater than 4.8 10 4. The results were used to calculate partial molar volumetric data and the isentropic compressibility of the solutions, both of which can be used as relevant properties to probe aggregate formation. In this context, micelle formation, solvation phenomena and water structural changes within the solutions are discussed in terms of the temperature and concentration dependence of the calculated properties. 2012 Elsevier

Compounds

#	Formula	Name
1	C12H23ClN2	1-methyl-3-octylimidazolium chloride
2	C14H27ClN2	1-decyl-3-methylimidazolium chloride
3	C16H31ClN2	1-dodecyl-3-methylimidazolium chloride
4	H2O	water

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	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	21
POMD	4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	11
POMD	4 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	161
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	161
POMD	4 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	133
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	133
POMD	4 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	153
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	153

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Probing the self-aggregation of ionic liquids in aqueous solutions using density and speed of sound data

Tariq, M., Moscoso, F., Deive, F. J., Rodriguez, A., Sanroman, M. A., Esperanca, J. M. S. S., Canongia Lopes, J. N., Rebelo, L. P. N.

ABSTRACT