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Investigation of rate parameters in chemical reactions of excited hydroxycoumarins in different solvents

1974; Elsevier BV; Volume: 3; Issue: 1 Linguagem: Inglês

10.1016/0047-2670(74)80006-7

1873-2658

P. E. Zinsli,

Luminescence and Fluorescent Materials

The reaction kinetics in the excited state is determined by investigating the absorption and emission spectra and the time-dependence of the fluorescence intensity of 7-hydroxycoumarin and 4-methyl-7-hydroxycoumarin in different solvents. The results are interpreted using a model of the reaction which takes into account the dependence of diffusion-controlled rate parameters on the dielectric constant of the solution. By fitting the theoretical expressions for the rate parameters to the experimental values reaction parameters are obtained.