Solvation within deep eutectic solvent-based systems: A review

Abstract

The deleterious health hazards of organic solvents impelled researchers to explore environmentally benign media with potential applications in science and technology. In this context, a greener alternative, deep eutectic solvent (DES) is reviewed to evaluate its full potential for various chemical processes. This chapter reviews (1) general properties of neoteric environmentally benign DES, (2) the polarity of and solvation dynamics within DESs and DESs-based systems to determine the solute–solvent and solvent–solvent interactions within such systems, (3) significant upshots of surfactant, dye, and ionic liquid (IL) aggregation within DESs and DESs-based systems, (4) the highlights of temperature effect on the physicochemical properties of DESs-based systems. The major methods are based on ultraviolet–visible absorbance, steady-state and time-resolved fluorescence spectroscopy along with other advanced spectroscopic techniques to explore various physicochemical properties associated with such systems. © 2023 Elsevier Inc. All rights reserved.