COMPETITIVE GEMINATE QUENCHING AND GEMINATE RECOMBINATION REACTIONS OF 1-NAPHTHOL

The back proton recombination following the photo-dissociation of l-na phthol was studied by a time-correlated single-photon counting apparat us. The measured picosecond time-resolved fluorescence decay profiles were analyzed using the numerical solution of the Debye-Smoluchowski e quation with coupled reversible and irreversible proton back-recombina tion reactions at the source. A full kinetic analysis shows that both the reversible geminate recombination reaction, which assumes at lone times a t(-3/2) dependence, and the irreversible geminate quenching re action, which assumes at long times a t(-1/2) dependence, are signific ant in determining the excited-state kinetics of 1-naphthol.