Aqueous choline amino acid deep eutectic solvents

Shurui Miao, Haihui Joy Jiang, Silvia Imberti, Rob Atkin, Gregory Warr

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We have investigated the structure and phase behavior of biocompatible, aqueous deep eutectic solvents by combining choline acetate, hydrogen aspartate, and aspartate amino acid salts with water as the sole molecular hydrogen bond donor. Using contrast-variation neutron diffraction, interpreted via computational modeling, we show how the interplay between anion structure and water content affects the hydrogen bond network structure in the liquid, which, in turn, influences the eutectic composition and temperature. These mixtures expand the current range choline amino acid ionic liquids under investigation for biomass processing applications to include higher melting point salts and also explain how the ionic liquids retain their desirable properties in aqueous solution.

Original languageEnglish
Article number214504
JournalJournal of Chemical Physics
Issue number21
Publication statusPublished - 7 Jun 2021


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