ABSTRACT

A range of imidazolium-based Bronsted acidic ionic liquids (ILs) have been synthesized by varying the side chain length of the alkyl and alkyl sulfonic group incorporated to the C1 and C3 positions in the imidazolium ring respectively with a fixed HSO4 anion. The synthesized ILs were characterized using NMR for structure confirmation and CHNS for elemental analysis. The thermal properties such as thermal decomposition temperature were determined using thermogravimetric analysis, and several key physical properties such as viscosity and density were measured within a temperature range of 20 deg C to 80 deg C using an Anton Paar viscometer and densitometer. The density measurement results and established equations were used to calculate the molecular volumes, standard entropies, crystal lattice energies, and thermal expansion coefficients of the synthesized ILs.

Compounds

#	Formula	Name
1	C7H14N2O7S2	1-methyl-3-(3-sulfopropyl)-imidazolium hydrogensulfate
2	C10H20N2O7S2	1-butyl-3-(3-sulfopropyl)-imidazolium hydrogensulfate
3	C8H16N2O7S2	1-methyl-3-(4-sulfobutyl)-imidazolium hydrogensulfate
4	C11H22N2O7S2	1-butyl-3-(4-sulfobutyl)-imidazolium hydrogensulfate

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	Phase	Method	#Points
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	1
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	1
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	1
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Vibrating tube method	1
POMD	4	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	1

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

Synthesis and Thermophysical Properties of Imidazolium-Based Bronsted Acidic Ionic Liquids

Muhammad, N.[Nawshad], Man, Z.[Zakaria], Elsheikh, Y.[Yasir], Bustam, M. A.[M. Azmi], Mutalib, M. I.[M Ibrahim]

ABSTRACT