Variation ofE T(30) polarity and the Kamlet-Taft solvatochromic parameters with composition in alcohol-alcohol mixtures

Solvatochromic parameter values, namely E_T(30) polarity, and Kamlet-Taft *, and , in alcoholic binary mixtures have been determined and correlated with solvent composition. The studied mixtures involve ethanol, methanol, 2-methoxyethanol and 1,2-ethandiol. Theoretical and semiempirical equations which embody preferential solvation of solvatochromic probes and allow the accurate interpolation of solvatochromic parameters are proposed.