Cited by 7,378Ionic liquids properties and applicationsLubricants and Their AdditivesN-Heterocyclic Carbenes in Organic and Inorganic Chemistry

Deep Eutectic Solvents (DESs) and Their Applications

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Smith, Emma L., Abbott, Andrew P., Ryder, Karl S.·2014·Chemical Reviews

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ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTDeep Eutectic Solvents (DESs) and Their ApplicationsEmma L. Smith*†‡, Andrew P. Abbott‡, and Karl S. Ryder‡View Author Information† Department of Chemistry, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, United Kingdom‡ Department of Chemistry, University of Leicester, Leicester LE1 7RH, United Kingdom*E-mail: [email protected]Cite this: Chem. Rev. 2014, 114, 21, 11060–11082Publication Date (Web):October 10, 2014Publication History Received18 April 2012Published online10 October 2014Published inissue 12 November 2014https://doi.org/10.1021/cr300162pCopyright © 2014 American Chemical SocietyRIGHTS & PERMISSIONSACS AuthorChoiceArticle Views194896Altmetric-Citations3706LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (17 MB) Get e-AlertscloseSUBJECTS:Anions,Deposition,Metals,Salts,Solvents Get e-Alerts

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  • DES are liquid at room temperature and characterized by non-flammability, low vapor pressure and low melting point, and high chemical and thermal stability.

    “In terms of properties, DES are liquid at room temp­ erature and characterized by non-flammability, low vapor pressure and low melting point, and high chemi­ cal and thermal stability (12-15,36).”

    From Evaluating the green credentials and performance of deep eutectic solvents in the extraction of antibiotics and mycotoxins in foods (2024) · cites this paper as [14]

    The Properties section (p. 3) describes DESs as having low vapor pressure, a relatively wide liquid range, and nonflammability; the Deep Eutectic Solvents section (p. 1) describes low melting points. But Properties (p. 3) says DESs are generally less chemically inert than traditional ionic liquids, and Green Credentials (p. 8) notes that some may decompose at higher temperatures. The blanket claim of high chemical and thermal stability is therefore not supported. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • DES can be designed to target a wide range of low-molecular weight compounds in food and feed by varying the type and molar concentrations of HBAs and HBDs.

    “As a result of their unique properties, DES can be designed to target a wide range of low-molecular weight compounds in food and feed by varying the type and molar concentrations of HBAs and HBDs (13-15).”

    From Evaluating the green credentials and performance of deep eutectic solvents in the extraction of antibiotics and mycotoxins in foods (2024) · cites this paper as [14]

    The review says DES properties can be tailored through the choice of hydrogen-bond donor (CONTENTS, p. 2), and that salt and donor type and molar ratio affect those properties (section 2.2, p. 4). It also describes selective extraction of certain metals (section 3.3, p. 15). It does not establish that varying those components lets DES target a wide range of low-molecular-weight compounds in food and feed. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • DESs are inexpensive, less toxic, and biodegradable.

    “They are inexpensive, less toxic, and biodegradable [25].”

    From Deep eutectic solvent as a novel disperser in dispersive liquid-liquid microextraction based on solidification of floating organic droplet (DLLME-SFOD) for preconcentration of steroids in water samples: Assessment of the method deleterious impact on the environment using Analytical Eco-Scale and Green Analytical Procedure Index (2019) · cites this paper as [25]

    Section 2 (p. 3) supports the low-cost claim relative to conventional ionic liquids. Section 2.6 (p. 8) reports that one choline chloride–ethylene glycol DES is readily biodegradable, but cautions that DESs are not inherently low-toxicity or biodegradable; toxicity varies by formulation and needs further study. The claim overgeneralizes those properties to DESs as a whole. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Charge delocalization through hydrogen bonding between a halide ion and the hydrogen-donor moiety is responsible for the decrease in the melting point of the DES mixture relative to the melting points of the individual components.

    “The charge delocalization occurring through hydrogen bonding between, for instance a halide ion and the hydrogen-donor moiety, is responsible for the decrease in the melting point of the mixture, in relation to the melting points of the individual components [19,20].”

    From Microextraction Techniques with Deep Eutectic Solvents (2020) · cites this paper as [20]

  • Four main types of DES occur: type I quaternary salt with a metal chloride, type II quaternary salt with a hydrated metal chloride, type III quaternary salt (HBA) with an HBD compound, and type IV metal chloride with an HBD.

    “Hence, four main different types of DES occur: I. quaternary salt with a metal chloride, II. quaternary salt with a hydrated metal chloride, III. quaternary salt (HBA) with an HBD compound and IV. metal chloride with an HBD.”

    From Microextraction Techniques with Deep Eutectic Solvents (2020) · cites this paper as [20]

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Authors
Smith, E. L., Abbott, A. P., & Ryder, K. S.
Affiliations
University of Leicester (GB)
Venue
Chemical Reviews
Published
2014-10-10
Volume
114
Issue
21
Pages
11060-11082
ISSN
  • 0009-2665 (ISSN-L)
  • 1520-6890
OpenAlex
W2321005010
Cited by
7,378
References
242
Citations by year
2026: 931 · 2025: 1010 · 2024: 939 · 2023: 935 · 2022: 814 · 2021: 741 · 2020: 662 · 2019: 482 · 2018: 339 · 2017: 276 · 2016: 144 · 2015: 94 · 2014: 7
FWCI
5.42
Type
journal article
Language
en
Open access
Locations
  • Chemical Reviews (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • Leicester Research Archive (University of Leicester) (submittedVersion, other-oa)
Funders
  • Engineering and Physical Sciences Research Council (NA)
  • Technology Strategy Board (NA)
  • European Commission (NA)
Topics
  • Physical Sciences › Chemical Engineering › Catalysis › Ionic liquids properties and applications
  • Physical Sciences › Engineering › Mechanical Engineering › Lubricants and Their Additives
  • Physical Sciences › Chemistry › Organic Chemistry › N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
Keywords
deep eutectic solvents, ionic liquids, solvent design, metal extraction, metal deposition, anion exchange, metal salts, green solvents

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