Abstract
The preferential solvation in mixed binary solvent, e.g., ethanol+acetonitrile, ethanol+propionitrile, and ethanol+butyronitrile, has been studied by monitoring the solvatochromic charge-transfer band of N-alkylpyridinium iodide. It appears that alcohols are preferred over the nitriles. A model for describing the preferential solvation of a dipolar in binary solvent mixture has been developed and discussed in relation to other existing approaches. The role of (a) solvent-solvent interaction and (b) difference in size of the component solvent molecules in determining the preferential solvation has also been discussed
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