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Deep eutectic solvents (DESs) have potential as designer media whose physical, chemical, electrochemical, and spectroscopic properties are easily and broadly tuned. Due to the ubiquity of water and the hygroscopic nature of many DES components, it is important to understand how water affects DESs both on the nanoscale and in the bulk. Here, we present a study of the physical properties of DES/water mixtures. We found that water appears to form a ternary DES when mixed with 2:1 urea/ChCl.
Smith et al. (Tue,) studied this question.