Linear solvation energy relationships: charge transfer band maxima of N-alkylpyridinium iodides in pure solvents

Abstract

Linear solvation energy relationships have been used to explain the solvatochromic behaviour of the charge transfer energy of N-alkylpyridinium iodides. It has been observed that a three parameter correlation involving dipolarity, hydrogen bond donating ability and hydrogen bond accepting ability of the solvent explains the observed solvent effect. From the correlation equation the relative contribution of different modes of solute–solvent interaction in determining the overall transition energy is also discussed.