Deep Eutectic Solvents (DESs) and Their Applications Emma L. Smith,*,+,?DESs have also been proposed as environmentally benign alternatives for synthesis.DESs are systems formed from a eutectic mixture of Lewis or Bronsted acids and bases which can contain a variety of anionic and/or cationic species; in contrast, ILs are formed from systems composed primarily of one type of discrete anion and cation.INTRODUCTION Deep eutectic solvents (DESs) are now widely acknowledged as a new class of ionic liquid (IL) analogues because they share many characteristics and properties with ILs.Compared to classical ILs, the research into DESs is comparatively in its infancy, with the first paper on the subject only published in 2001.1 However, with publications from the past decade now approaching 200 an increasing amount of research effort is focusing on this emerging field.Transformations of Unprotected Sugars, Cellulose, and Starch 11077 4.5.Immersion and Electroless Coatings 11072 3.2.10.1.1.