Jump to main content
Jump to site search

Issue 5, 2017
Previous Article Next Article

Deep eutectic solvents: similia similibus solvuntur?

Author affiliations


Deep eutectic solvents, mixtures of an organic compound and a salt with a deep eutectic melting point, are promising cheap and eco-friendly alternatives to ionic liquids. Ab initio molecular dynamics simulations of reline, a mixture consisting of urea and choline chloride, reveal that not solely hydrogen bonds allow similar interactions between both constituents. The chloride anion and the oxygen atom of urea also show a similar spatial distribution close to the cationic core of choline due to a similar charge located on both atoms. As a result of multiple similar interactions, clusters migrating together cannot be observed in reline which supports the hypothesis similia similibus solvuntur. In contrast to previous suggestions, the interaction of the hydroxyl group of choline with a hydrogen bond acceptor is overall rigid. Fast hydrogen bond acceptor dynamics is facilitated by the hydrogen atoms in the trans position to the carbonyl group of urea which contributes to the low melting point of reline.

Graphical abstract: Deep eutectic solvents: similia similibus solvuntur?

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Nov 2016, accepted on 05 Jan 2017 and first published on 05 Jan 2017

Article type: Paper
DOI: 10.1039/C6CP08017K
Phys. Chem. Chem. Phys., 2017,19, 4041-4047

  •   Request permissions

    Deep eutectic solvents: similia similibus solvuntur?

    S. Zahn, Phys. Chem. Chem. Phys., 2017, 19, 4041
    DOI: 10.1039/C6CP08017K

Search articles by author