DETERMINATION OF THE SOLUBILIZING CHARACTER OF 1-(2-HYDROXYETHYL)-1-METHYLIMIDAZOLIUM TRIS(PENTAFLUOROETHYL)TRIFLUOROPHOSPHATE BASED ON THE ABRAHAM SOLVATION PARAMETER MODEL

Pamela Twu, Jared L. Anderson, Timothy W. Stephens, Helen Lu, Kalpana Satish, Danyang Shan, William E. Acree, Jr., Michael H. Abraham

Abstract


Chromatographic retention factor data were measured for a chemically diverse set of thirty-seven organic solutes on a 1-(2-hydroxyethyl)-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate ([EtOHMIm]+[FAP]) ionic liquid stationary phase at both 323 K and 353 K.   The measured retention factors were combined with published gas-to-liquid partition coefficient data for solutes dissolved in ([EtOHMIm]+[FAP]) and with published gas-to-water partition coefficient data to yield gas-to-anhydrous ionic liquid and water-to-anhydrous ionic liquid partition coefficients.  The three sets of partition coefficients were correlated with the Abraham solvation parameter model.  The derived Abraham model correlations describe the experimental gas-to-ionic liquid and water-to-ionic liquid partition coefficient data to within an average standard deviation of 0.12 log units.


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DOI: http://dx.doi.org/10.17628/ecb.2013.2.954-964

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