Absorption spectral band width of charge transfer transition of ET(30) dye in homogeneous and heterogeneous media

Solvation characteristics in homogeneous and heterogeneous media have been probed by monitoring the band width of ICT band of 2,6-di-phenyl-4(2,4,6-triphenyl-1-pyridino) phenolate, the indicator solute for ET(30) scale, in pure, mixed binary solvents and aqueous micellar solution. Non-ideal solvation behaviour is observed in all the binary solvent mixtures. Index of preferential solvation has been calculated as a function of solvent composition. Study in micellar media indicates that the dye is located at the micelle–water interface. The effects of variation of micelle concentration, temperature and electrolyte concentration have also been studies. [Copyright &y& Elsevier]