Deep eutectic solvents: overcoming 21st century challenges

In the last couple of years, deep eutectic solvents (DESs) have been raising a lot of attention mainly due to their versatility and their easy and speedy preparation without the need of further purification. Moreover, the vast array of very different compounds that can be selected for their preparation has led to the full tailoring of their relevant properties as solvents. We herein leave our opinion on the current challenges and opportunities in this blossoming field, which are curiously aligned with the scope of today's major concerns, where DESs are called to make a valuable contribution to important areas such as clean water, clean energy, and biotechnology.