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Recent Advances in Hydrophobic Deep Eutectic Solvents for Extraction

Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA
Separations 2019, 6(1), 9; https://doi.org/10.3390/separations6010009
Received: 24 November 2018 / Revised: 17 January 2019 / Accepted: 27 January 2019 / Published: 12 February 2019
(This article belongs to the Special Issue Recent Advances on Ionic Liquid Uses in Separation Techniques)
In the over 1,800 articles published since their inception in 2001, most deep eutectic solvents (DES) synthesized have been hydrophilic. The low cost, low toxicity, and bioavailability of DES make the solvent ‘green’ and sustainable for diverse applications. Conversely, the hydrophilicity of DES limits their practical application to only polar compounds, which is a major drawback of the solvent. For the past three years, hydrophobic deep eutectic solvents (HDES) have emerged as an alternative extractive media capable of extracting non-polar organic and inorganic molecules from aqueous environments. Due to the infancy of HDES, for the first time, this mini-review summarizes the recent developmental advances in HDES synthesis, applications, challenges, and future perspectives of the solvent. In the future, it is believed HDES will replace the majority of toxic organic solvents used for analytical purposes. View Full-Text
Keywords: deep eutectic solvents; hydrophilic; hydrophobic; liquid-liquid extraction; transition metals deep eutectic solvents; hydrophilic; hydrophobic; liquid-liquid extraction; transition metals
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Dwamena, A.K. Recent Advances in Hydrophobic Deep Eutectic Solvents for Extraction. Separations 2019, 6, 9.

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