Ionic liquids vs. deep eutectic solvents

M. Francisco Casal, A. Bruinhorst, van den, L.F. Zubeir, C.J. Peters, M.C. Kroon

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic


    Ionic Liqs. (ILs) attracted particular attention over the past decade because they can be designed by choosing the proper cation-anion combination to pursuit the best performance as solvents for a certain application. Together with their, in general, extremely low volatility, the so-called "Task Specific Ionic Liqs." show promising advantages for CO2 capture compared to the conventional solvents. However, the "green" character of ILs can be questioned because most of them are produced from fossil resources and their synthesis cannot be considered as being "green". Moreover, the high prodn. and purifn. cost do not make ILs technol. competitive with traditional solvents.To overcome some of the limitations of ILs, Deep Eutectic Solvents (DES) were recognized as potential alternatives. These low transition temp. mixts. (LTTMs) consist of at least one hydrogen bond donor (HBD) and one hydrogen bond acceptor (HBA) counterpart, resulting in the formation of a liq. mixt. showing an unusual low f.p. Due to the high hydrogen bonding interaction, some of the promising characteristics of ILs as solvents are shared by DESs. They often possess an extremely low volatility, and their properties can be adjusted by selecting the nature and ratio of the hydrogen bonding pairs. They can also be designed to show a wide liq. range, water-compatibility, non-flammability, non-toxicity, biocompatibility or biodegradability. Finally, they can be easily prepd. from readily available starting materials and becoming a competitive solvent in terms of cost
    Original languageEnglish
    Title of host publication248th ACS National Meeting & Exposition, August 10-14, 2014, San Francisco, California
    Publication statusPublished - 2014
    Event248th ACS National Meeting & Exposition
    - San Francisco, United States
    Duration: 10 Aug 201414 Aug 2014


    Conference248th ACS National Meeting & Exposition
    Country/TerritoryUnited States
    CitySan Francisco


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