ABSTRACT

In this work, the thermal behavior and heat capacities of four pyridinium and two imidazolium-based ionic liquids (1-ethyl-3- methylpyridinium bis(trifluoromethylsulfonyl)imide, C2MpyNTf2, 3-methyl- 1-propylpyridinium bis(trifluoromethylsulfonyl)imide, C3MpyNTf2, 1-butyl- 3-methylpyridinium bis(trifluoromethylsulfonyl)imide, C4MpyNTf2, 1-butyl- 3-methylpyridinium trifluoromethanesulfonate, C4MpyTFO, 1-butyl-3- methylimidazolium trifluoromethanesulfonate, C4MimTFO, and 1-butyl-3- methylimidazolium dicyanamide, C4MimDCA) have been experimentally determined using differential scanning calorimetry, and the obtained results have been compared and analyzed. The influence of the scan rate on the thermal analysis has been discussed along with the influence of the structure of the ionic liquid on the heat capacity.

Compounds

#	Formula	Name
1	C10H12F6N2O4S2	1-ethyl-3-methylpyridinium bis((trifluoromethyl)sulfonyl)amide
2	C11H14F6N2O4S2	3-methyl-1-propylpyridinium bis(trifluoromethylsulfonyl)imide
3	C12H16F6N2O4S2	1-butyl-3-methylpyridinium 1,1,1-trifluoro-N-[(trifluoromethyl)sulfonyl]methanesulfonamide
4	C11H16F3NO3S	1-butyl-3-methylpyridinium trifluoromethanesulfonate
5	C9H15F3N2O3S	1-butyl-3-methylimidazolium trifluoromethanesulfonate
6	C10H15N5	1-butyl-3-methylimidazolium dicyanamide

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	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	41
POMD	2	Triple point temperature, K ; Glass			Glass Liquid Air at 1 atmosphere	DTA	1
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	41
POMD	3	Triple point temperature, K ; Glass			Glass Liquid Air at 1 atmosphere	DTA	1
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	41
POMD	4	Normal melting temperature, K ; Metastable crystal			Metastable crystal Liquid Air at 1 atmosphere	DTA:corrimp	1
POMD	4	Normal melting temperature, K ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DTA	1
POMD	4	Triple point temperature, K ; Glass			Glass Liquid Air at 1 atmosphere	DTA	1
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	31
POMD	5	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	5	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	31
POMD	6	Triple point temperature, K ; Crystal 2			Crystal 2 Crystal 1 Gas	DTA	1
POMD	6	Normal melting temperature, K ; Crystal 1			Crystal 1 Liquid Air at 1 atmosphere	DTA	1
POMD	6	Triple point temperature, K ; Glass			Glass Liquid Air at 1 atmosphere	DTA	1
POMD	6	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Large sample (1 g) DSC	41

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Thermal analysis and heat capacities of pyridinium and imidazolium ionic liquids

Calvar, N.[Noelia], Gomez, E.[Elena], Macedo, E. A.[Eugenia A.], Dominguez, A.[Angeles]

ABSTRACT