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Octanol/water Partition Coefficients of Ionic Liquids by Sang Hyun Lee; Sun Bok Lee is a Engineering article available to read on EtoBox.

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## Abstract **BACKGROUND:** Room temperature ionic liquids (ILs) are attractive alternatives to environmentally unfriendly volatile organic solvents. Partitioning is one of the most important and fundamental properties of a chemical, and the octanol/water partition coefficient is widely used to measure the tendency of a chemical to cross biological membranes. However, there is very limited information on the concentration dependence of the partition coefficients of ILs. This study investigated the octanol/water partitioning of 1‐butyl‐3‐methylimidazolium ([bmim]) ILs containing either hexafluorophosphate ([PF~6~]) or bis[(trifluoromethyl)sulfonyl]amide ([Tf~2~N]) over a wide range of IL concentrations of three to five orders of magnitude. **RESULTS:** It was found that the apparent partition coefficients of the ILs increased with increasing IL concentration. A model based on the ionic nature of ILs was proposed to explain this behaviour, and the results showed a good fit with the experimental data. The intrinsic partition coefficients and dissociation constants of the ILs were determined using the equations from the proposed model. The differences in the intrinsic partition paramet

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Author

Sang Hyun Lee; Sun Bok Lee

Publisher

Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0268-2575)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)