| Abstract
| - Room-temperature ionic liquids (RTILs) are useful in many chemical applications. Recentpublications have attempted to determine the polarity of RTILs using empirical solvent polarity scales. Theresults have indicated that most RTILs have similar polarities. Nevertheless, RTILs are capable of behavingquite differently when used as solvents in organic synthesis, matrixes in matrix-assisted laser desorption/ionization (MALDI) mass spectrometry, liquid−liquid extraction, and as stationary phases in gas chromatography. The work presented in this study uses a linear free energy approach to characterize 17 RTILson the basis of their distinct multiple solvation interactions with probe solute molecules. This model providesdata that can be used to help identify the interactions and properties that are important for specific chemicalapplications.
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