Role of coherent vibrations in energy transfer and conversion in photosynthetic pigment–protein complexes

Oscillatory features of two-dimensional spectra of photosynthetic pigment–protein complexes during few picoseconds after electronic excitations of chlorophylls in various pigment–proteins were recently related to the coherent nuclear vibrations. It has been also speculated that the vibrations may as...

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Bibliographic Details
Published in:Photosynthesis research 2016-01, Vol.127 (1), p.33-47
Main Authors: Abramavicius, Darius, Valkunas, Leonas
Format: Article
Language:English
Subjects:
Biochemistry
Biomedical and Life Sciences
chlorophyll
Chlorophyll - chemistry
Chlorophyll - metabolism
electron transfer
Electrons
Energy
energy conversion
Energy Transfer
Life Sciences
Models, Biological
Models, Theoretical
Photosynthesis
Photosynthetic Reaction Center Complex Proteins - chemistry
Photosynthetic Reaction Center Complex Proteins - metabolism
Plant Genetics and Genomics
Plant Physiology
Plant Sciences
Proteins
Regular Paper
Vibration
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Summary:Oscillatory features of two-dimensional spectra of photosynthetic pigment–protein complexes during few picoseconds after electronic excitations of chlorophylls in various pigment–proteins were recently related to the coherent nuclear vibrations. It has been also speculated that the vibrations may assist the excitonic energy transfer and charge separation, hence contributing to energy transport and energy conversion efficiency. Here, we consider three theoretical approaches usually used for characterization of the excitation dynamics and charge separation, namely Redfield, Förster, and Marcus model descriptions, regarding this question. We show that two out of the three mechanisms require explicit resonances of excitonic splittings and the nuclear vibration frequencies. However, the third one related to the electron transfer is in principle off resonant.
ISSN:0166-8595
1573-5079
DOI:10.1007/s11120-015-0080-6