Dynamic processes of the excited state proton transfer of 4-methyl-2,6-diacetylphenol in protic solvents at room temperature and 77K: interaction with base

Abstract

The excited state proton transfer (ESPT) reaction of 4-methyl-2,6- diacetylphenol (MAOH) in water and some alcoholic solvents have been studied in presence and absence of base by means of steady state absorption, emission and time resolved emission spectroscopy. Solute-solvent interaction appears to play a major role in determining the nature of absorbing and fluorescing species in these solvents. Solvent basicity is the predominant factor in controlling rate and extent of ESPT reaction of MAOH and orientational relaxation of solvent molecules has only a minor effect on it.