Abstract
Infinite dilution activity coefficients and gas-to-ionic liquid partition coefficients were measured for a chemically diverse set of 48 or more organic solute probes dissolved in the ionic liquids 1-benzylpyridinium bis(trifluoromethylsulfonyl)imide ([BzPy][Tf2N]) and 1-cyclohexylmethyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([ChxmPyrr][Tf2N]) in the temperature range from 323.15 to 373.15 K using inverse gas chromatography. Selectivities and capacities for different separation problems were calculated from the measured chromatographic data. The measured partition coefficients were correlated using mathematical equations based on the Abraham general solvation parameter model. The derived Abraham model correlations back-calculated the observed partition coefficients to within 0.12 log10 units.
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