Abstract
New theoretical expressions to account for adiabatic and diabatic excited-state proton transfer in water, as well as the effect of the presence of added buffers, have been deduced for steady-state fluorescence emission measurements. These expressions are easy to manipulate and adequate for the calculation of rate constants by fitting of experimental data. A systematic procedure to obtain kinetic parameters of the several excited-state processes involving proton transfer is also proposed. Finally, the expressions have been tested on the parametrization of the titration curves followed by steady-state fluorescence emission of phenol, beta-naphthol, alpha-naphthol and acridine. In the particular case of alpha-naphthol and acridine we were able to describe and characterize for the first time, the diabatic quenching effect of a buffer.
Original language | English |
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Pages (from-to) | 957-968 |
Number of pages | 12 |
Journal | Journal of the Chemical Society - Faraday Transactions |
Volume | 92 |
Issue number | 6 |
DOIs | |
Publication status | Published - 21 Mar 1996 |