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Trends in Photochemistry & Photobiology   Volumes    Volume 4 
Abstract
Theories of photo-induced electronic energy transfer in biological systems
X. -Z. Gu, M. Hayashi, K. K. Liang, R. L. Chang, C. H. Chang, S. H. Lin
Pages: 183 - 211
Number of pages: 29
Trends in Photochemistry & Photobiology
Volume 4 

Copyright © 1997 Research Trends. All rights reserved

ABSTRACT
 
The Förster-Dexter theory commonly used in the photo-induced energy transfer is derived and its limitations are discussed. To overcome several limitations of the conventional Förster-Dexter theory. Generalized Förster-Dexter theory is developed and presented in this work. The energy gap dependence and temperature effect on energy transfer are studied. Monopole-monopole interaction model is proposed to approximate the electronic matrix elements. By using Zerner`s intermediate neglect of differential overlap (spectra) semi-empirical program, the electronic matrix elements are obtained for the three caroteno-porphyrin isomers in second-order approximation. Using these electronic matrix elements, the energy transfer rates of these model dyads are calculated based on generalized Förster-Dexter theory. Theoretical calculations are in good agreement with the experimental results. The results show that the super-exchange can be an important role in energy transfer.
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