ABSTRACT

In this work, we explore the anion effect on the thermophysical properties of protic ionic liquids (PILs) such as triethylammonium acetate [Et3NH][CH3COO-], triethylammonium dihydrogen phosphate [Et3NH][H2PO4 -] and triethylammonium hydrogen sulfate [Et3NH][HSO4 -] with polar solvent such as dimethylsulfoxide (DMSO). In this regard, densities (n), ultrasonic sound velocities (u) and viscosities (c) have been measured over whole composition range and temperature range from 298.15 to 308.15 K under atmospheric pressure. The empirical polynomial and Arrhenius equations were used to correlate the n and c as function of temperature, respectively. The correlation was quite good for both the properties. Sound velocity mixing rules were used on experimental values. Further, the excess molar volume (VE), the deviation in isentropic compressibility (Aes) and deviation in viscosity (Ac) were calculated using these properties. The obtained VE , Aes and Ac values were correlated by using the Redlich.Kister polynomial equation.

Compounds

#	Formula	Name
1	C2H6OS	dimethyl sulfoxide
2	C6H18NO4P	triethylammonium dihydrogen phosphate
3	C6H17NO4S	triethylammonium hydrogen 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	Constraint	Phase	Method	#Points
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	4
POMD	1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Single crystal ultrasonic interferometer	3
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	vibro viscometer	4
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	3
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Single crystal ultrasonic interferometer	3
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	vibro viscometer	3
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	3
POMD	3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Single crystal ultrasonic interferometer	3
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	vibro viscometer	3
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	60
POMD	1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Single crystal ultrasonic interferometer	60
POMD	1 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	vibro viscometer	60
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	60
POMD	1 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	Single crystal ultrasonic interferometer	60
POMD	1 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid	vibro viscometer	60

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Effect of anion variation on the thermophysical properties of triethylammonium based protic ionic liquids with polar solvent

Govinda, V.[Varadhi], Reddy, P. M., Bahadur, I.[Indra], Attri, P.[Pankaj], Venkatesu, P., Venkateswarlu, P.

ABSTRACT