Characterization of the solubilizing ability of short-chained glycol-grafted ammonium and phosphonium ionic liquids.

Infinite dilution activity coefficients and gas-to-liquid partition coefficients are reported for >40 organic solvents dissolved in (2-methoxyethyl) triethylphosphonium bis(trifluoromethylsulfonyl)imide, (2-methoxyethyl)tributylphosphonium bis(trifluoromethylsulfonyl)imide, and (2-methoxyethyl)triethylammonium bis(trifluoromethylsulfonyl)imide in the temperature range from 323.15 K to 373.15 K. Experimental values were determined using the method of inverse gas chromatography. Measured infinite dilution activity coefficients are used to calculate the partial molar excess Gibbs free energy, enthalpy and entropy associated with dissolution of the organic solutes into the three ionic liquid solvents. Abraham model correlations for solute transfer into each ionic liquid solvent have also been determined from the measured infinite dilution activity coefficient data. • Infinite dilution activity coefficients measured for solutes in three new glycol-functionalized ionic liquids. • Gas-to-liquid partition coefficients determined for solutes in these glycol-functionalized ionic liquids. • Abraham model correlations reported for solute transfer into these glycol-functionalized ionic liquids. [ABSTRACT FROM AUTHOR]