ABSTRACT

In the present work, experimental density measurements are reported along with the derived thermodynamic properties, such as the isothermal compressibility (eT), the isobaric expansivity (Rp), and the thermal pressure coefficient (aV) for imidazolium-, pyridinium-, pyrrolidinium-, and piperidinium-based ionic liquids (ILs), namely, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate [C2mim][CF3SO3], 3-methyl-1-propylpyridinium bis(trifluoromethylsulfonyl)imide [C3mpy][NTf2], 1-methyl-1-propylpyrrolidinium bis(trifluoromethylsulfonyl) imide [C3mpyr][NTf2], 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide [C4mpyr][NTf2], and 1-methyl-1-propylpiperidinium bis(trifluoromethylsulfonyl)imide [C3mpip][NTf2] in the pressure (0.10 less than P/MPa less than 35.00) and temperature (293.15 less than T/K less than 393.15) domains. These ILs were chosen to provide an understanding of the influence of the cation and anion on the properties under study. Experimental densities are correlated with the Tait equation with an average absolute relative deviation (AARD) better than 0.02 %. It is shown that experimental densities are in good agreement with the densities obtained by the predictive method previously proposed by us.

Compounds

#	Formula	Name
1	C7H11F3N2O3S	1-ethyl-3-methylimidazolium trifluoromethanesulfonate
2	C11H14F6N2O4S2	3-methyl-1-propylpyridinium bis(trifluoromethylsulfonyl)imide
3	C10H18F6N2O4S2	1-methyl-1-propylpyrrolidinium bis[(trifluoromethyl)sulfonyl]imide
4	C11H20F6N2O4S2	1-butyl-1-methylpyrrolidinium bis[(trifluoromethyl)sulfonyl]imide
5	C11H20F6N2O4S2	1-methyl-1-propylpiperidinium bis(trifluoromethylsulfonyl)imide

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	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	91
POMD	2	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	91
POMD	3	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	91
POMD	4	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	91
POMD	5	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	91

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

Densities and Derived Thermodynamic Properties of Imidazolium-, Pyridinium-, Pyrrolidinium-, and Piperidinium-Based Ionic Liquids

Gardas, R. L.[Ramesh L.], Costa, H. F.[Henrique F.], Freire, M. G.[Mara G.], Carvalho, P. J.[Pedro J.], Marrucho, I. M.[Isabel M.], Fonseca, I. M. A.[Isabel M. A.], Ferreira, A. G. M.[Abel G. M.], Coutinho, J. A. P.[Joao A. P.]

ABSTRACT