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INVESTIGATION OF MIGRATION PARAMETERS OF ELECTRON EXCITATION ENERGY IN PHOTOSYNTHETIC and ARTIFICIAL SYSTEMS
Author(s) -
Rubin L. B.,
Braginskaya O. V.,
Isakova M. L.,
Efremov N A.
Publication year - 1985
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1985.tb03550.x
Subject(s) - excitation , picosecond , diffusion , annihilation , quenching (fluorescence) , chemistry , electron , electron excitation , chemical physics , atomic physics , fluorescence , optics , physics , laser , thermodynamics , nuclear physics , quantum mechanics
— The technique for the determination of diffusion parameters on the basis of nonlinear fluorescence quenching and excitation energy capturing by the traps is discussed. The nonstationary character of the processes of excitation capturing by traps and of singlet‐singlet annihilation which occur upon the system excitation by a picosecond pulse is taken into account. The obtained values of the diffusion parameters in the artificial pigment‐polymer antenna system (the diffusion coefficient ∼ 10 ‐2 cm 2 s ‐1 and the diffusion length ∼ 500 Å) are close to those in the photosynthesizing systems. It is also shown that the method of the determination of diffusion parameters on the basis of excitation capturing by the reaction centres may be applied for the study of the native photosynthetic systems.