Abstract
The effects of water on charge-transfer (CT) transition energy, hνCT, and the equilibrium constant, Kc, for complexations of chlorpromazine hydrochloride with p-xyloquinone and sodium N, N-dimethyl-p-aminobenzoate with sodium anthraquinone-2-sulfonate were investigated in aqueous ethanol, aqueous dioxane, or water. With an increase water content of the media, hνCT decreased and Kc increased markedly. Especially correlations were recognized between hνCT and water content, and between log Kc logarithm of dielectric constant of the media. From the results, mechanism of the of water was speculated. It may be concluded that water does not obstruct but promotes the CT complexations presumably by specific and non-specific effects.
