Abstract
Solvation characteristics in ternary solvent mixtures has been studied by monitoring the solvent-sensitive fluorescence band of a ketocyanine dye [(1-1), (9-1)-di-1, 9-di-(2,3-dihydroindolyl)-4,6-dimethylene-nona-1,3,6,8-tetraene-5-one] in ethanol+benzene+water and ethanol+benzene+acetone mixture. Investigations have been done in the completely miscible region of the ternary mixtures including the binodal curve (for ethanol+benzene+water mixture). The maximum transition energy of fluorescence in a ternary solvent mixture differs significantly from the average value of maximum energy of transition in component solvents weighted by the mole fraction of the solvents. The results have been explained in terms of a realistic model of solvation in a ternary mixture.
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