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Title: Thermodynamics of phase transfer for polar molecules from alkanes to deep eutectic solvents
Authors: Abbott, Andrew P
Al-Murshedi, Azhar Y. M.
Alshammari, Odeh A. O.
Harris, Robert C.
Kareem, Jalil H.
Qader, Idrees B.
Ryder, Karl
First Published: 6-May-2017
Publisher: Elsevier
Citation: Fluid Phase Equilibria, 2017, 448, pp. 99-104
Abstract: Deep eutectic solvents (DESs) have been used for the purification of oils and the extraction of active ingredients from natural products but little is known about the mechanism of the extraction process. In this study a variety of molecular solutes are dissolved in alkanes and the thermodynamics of transfer into six DESs have been quantified. It is shown that the transfer of most solutes into the DES is endothermic and driven by entropy. The largest partition coefficients were demonstrated by the liquids with the lowest surface tensions and this is thought to arise because the enthalpy of hole formation controls the rate of solute transfer. Accordingly, it was shown that the size of the solute has an effect on the partition coefficient with smaller solutes partitioning preferably into the DES. As expected, solutes capable of strongly hydrogen bonding partitioned much better into the DES as the enthalpy of transfer was negative.
DOI Link: 10.1016/j.fluid.2017.05.008
ISSN: 0378-3812
eISSN: 1879-0224
Embargo on file until: 6-May-2019
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © Elsevier 2017. After an embargo period this version of the paper will be an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License (, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Description: The file associated with this record is under embargo until 24 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.
Appears in Collections:Published Articles, Dept. of Chemistry

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