Recent developments in deep eutectic solvents in chemical sciences

In recent years, deep eutectic solvents (DESs) have been considered green solvent alternatives to conventional solvents and have attracted considerable attention. With an in-depth understanding of the common and novel properties of DESs, many of them have been prepared and applied to various areas of chemistry. To summarize the full-scale development of DESs, we reviewed this field from its inception. This review summarizes the general trends in the development of DESs and evaluates the major aspects of DESs, such as their properties, preparations, and applications. This work is expected to be helpful for the further development of DESs based on a summary of the fundamental research in the field.