Chameleonic Behavior of Ionic Liquids and Its Impact on the Estimation of Solubility Parameters
authors Batista, MLS; Neves, CMSS; Carvalho, PJ; Gani, R; Coutinho, JAP
nationality International
journal JOURNAL OF PHYSICAL CHEMISTRY B
keywords DILUTION ACTIVITY-COEFFICIENTS; INVERSE GAS-CHROMATOGRAPHY; 1-BUTYL-3-METHYLIMIDAZOLIUM METHYL SULFATE; PRESSURE CARBON-DIOXIDE; EXCESS MOLAR PROPERTIES; REGULAR SOLUTION THEORY; INFINITE-DILUTION; THERMODYNAMIC PROPERTIES; BINARY-MIXTURES; ORGANIC SOLUTES
abstract The possibility of developing a scale for solubility parameters, with the purpose of predicting the performance and aiding the selection of ILs, was evaluated. For the estimation of solubility parameters, infinite-dilution activity coefficient data were used. The results allowed the identification of a curious behavior for ILs that seem to present more than one solubility parameter, acting as polar molecules in some situations and as nonpolar molecules in others, depending on the medium. This behavior was confirmed by solubility measurements of [C4MIM] [PF6] in solvent mixtures. In this work, the solubility parameters were also estimated from other properties, namely, viscosities and enthalpies of vaporization, and the relation between the various sets of solubility parameters is discussed. The results obtained suggest that, given the complexity of IL molecules and their liquid phases, a one-dimensional scale for solubility parameters that is able to characterize these fluids is not feasible.
publisher AMER CHEMICAL SOC
issn 1520-6106
year published 2011
volume 115
issue 44
beginning page 12879
ending page 12888
digital object identifier (doi) 10.1021/jp207369g
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000296394100023
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journal analysis (jcr 2017):
journal impact factor 3.146
5 year journal impact factor 3.101
category normalized journal impact factor percentile 60.204
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