Determination of solvatochromic parameter in binary mixtures of deep eutectic solvent with molecular solvents

Binary mixtures of solvents are widely used in chemical processes in order to tune the polarityproperties of the media and to facilitate chemical and physical processes. In this study, ethaline as a deepeutectic solvent was considered as new green media for chemical processes. The physicochemical propertiesof the solvent mixtures, consisting of solvatochromic parameters, were obtained using solvatochromicprobes. Solvatochromic parameters of binary mixture of Ehaline with ethanol, butanol, propanol, water,acetonitrile and DMSO, were measured under atmosphere pressure, at the room temperature. Results showedthat the polarityand hydrogen bond donor ability of the ethaline decreaseswith increasingmole fraction ofmolecular solvents, while hydrogen bond acceptor ability of the media shows a different pattern.Deviationfrom ideal behavior, observed for solvatochromic parameters, confirmed preferential solvation of thesolutesin these media.

کلیدواژه ها:

Deep eutectic solvents ، Solvatochromic parameters ، physicochemical properties