Photophysics of lumichrome in anionic and cationic micellar media

Abstract

The photophysics of lumichrome was studied in the presence of different cationic and anionic micellar environments. The change in ground and excited state spectral characteristics of lumichrome has been reported. Lumichrome showed excitation and emission wavelength dependent emission behaviour in micellar media. It is due to the presence of different species of lumichrome. The binding constants and free energy changes are dependent on the hydrophobic alkyl tail group of the surfactant. The time resolved area normalised emission spectra (TRANES) reveal the presence of an isoemissive point. It is due to two different emissive species present in the micellar media.