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Non‐linear fluorescence quenching in molecular crystals I. Recombination of localized excitons
Author(s) -
Benderskii V. A.,
Kh. Brikenshtein V.,
Lavrushko A. G.,
Filippov P. G.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220860202
Subject(s) - anthracene , quantum yield , recombination , excited state , fluorescence , quenching (fluorescence) , chemistry , exciton , dipole , radius , naphthalene , photochemistry , atomic physics , reaction rate constant , absorption (acoustics) , singlet state , molecular physics , absorption spectroscopy , kinetics , physics , optics , condensed matter physics , computer security , biochemistry , organic chemistry , quantum mechanics , computer science , gene
From the measurements of quantum yield and fluorescence decay time of anthracene and naphthalene crystals for different pumping levels at 300 K the rate constants of bimolecular recombination of excitons are found to γ = (1 ± 0.3) × 10 −8 and (3 ± 1.5) × 10 −11 cm 3 S −1 , respectively. The relationship between the recombination constants and the interaction radius R 0 is calculated for the dipole‐dipole mechanism of recombination. Based on this assumption the values of R 0 , (40 ± 5) Å in anthracene and (25 ± 5) Å in naphthalene, agree with the values calculated from the overlap of fluorescence and lower excited singlet state absorption spectra.