Journal
SOFT MATTER
Volume 18, Issue 14, Pages 2695-2721Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1sm01797g
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Funding
- University Grants Commision (UGCMANF), Govt. of India
- Cochin University of Science and Technology
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Deep eutectic solvents (DESs), modified versions of ionic liquids (ILs), have gained attention as alternatives to conventional organic solvents and ILs due to their tunable physiochemical properties and wide range of applications.
Deep eutectic solvents (DESs) are modified versions of ionic liquids (ILs) and are formed by the fusion of polar components (liquids or solids) via hydrogen bonding interactions. DESs are prepared by the simple mixing of two or three cheap constituents (that are capable of self-association) with gentle heating, which leads to a drastic decrease in their melting points. The resultant clear homogeneous mixture consists of cations, anions, as well as neutral molecules; this will contribute both ionic and molecular solvent properties to the DESs. DESs have emerged as alternatives to conventional organic solvents and ILs, which meet different criteria such as availability, low cost, low toxicity, biodegradability, recyclability, ease of preparation method, tunable, and designer physiochemical properties. Many of them have attracted considerable attention and haave been applied in distinct fields of chemistry. To summarize the full-scale development of DESs, this review discusses the history, classifications, various methods of preparation, properties, and some major applications in catalysis in the last three years. This review is expected to be helpful for the further development of DESs based on a summary of the fundamental research in the field.
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