Densities and derived thermodynamic properties of imidazolium-, pyridinium-, pyrrolidinium-, and piperidinium-based ionic liquids

authors	Gardas, RL; Costa, HF; Freire, MG; Carvalho, PJ; Marrucho, IM; Fonseca, IMA; Ferreira, AGM; Coutinho, JAP
nationality	International
journal	JOURNAL OF CHEMICAL AND ENGINEERING DATA
keywords	EXTENDED PRESSURE RANGE; RHO-T MEASUREMENTS; PHYSICOCHEMICAL PROPERTIES; PHYSICAL-PROPERTIES; HEAT-CAPACITIES; TEMPERATURE; HEXAFLUOROPHOSPHATE; DEPENDENCE; VISCOSITY; MEMBRANES
abstract	In the present work, experimental density measurements are reported along with the derived thermodynamic properties, such as the isothermal compressibility (K-T), the isobaric expansivity (alpha(p)) and the thermal pressure coefficient (gamma(v)) for imidazolium-, pyridinium-, pyrrolidinium-, and piperidinium-based ionic liquids (ILs), namely, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate [C(2)mim][CF3SO3], 3-methyl-1-propylpyridinium bis(trifluoromethylsulfonyl)imide [C(3)mpy][NTf2], 1-butly- 1-propylpyrrolidinium bis(trifluoromethylsulfonyl)imide [C(3)mpyr][NTf2],1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide [C(4)mpyr][NTf2], and 1-methyl-1-propylpiperidinium bis(trifluorornethylsulfonyl)imide [C(3)mpip][NTf2] in the pressure (0.10 < P/MPa < 35.00) and temperature (293.15 < T/K < 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.
publisher	AMER CHEMICAL SOC
issn	0021-9568
year published	2008
volume	53
issue	3
beginning page	805
ending page	811
digital object identifier (doi)	10.1021/je700670k
web of science category	Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical
subject category	Thermodynamics; Chemistry; Engineering
unique article identifier	WOS:000254008900034