Importance of excitation and trapping conditions in photosynthetic environment-assisted energy transport

Leon-Montiel, Roberto de J., Kassal, Ivan and Torres, Juan P. (2014) Importance of excitation and trapping conditions in photosynthetic environment-assisted energy transport. Journal of Physical Chemistry B, 118 36: 10588-10594. doi:10.1021/jp505179h


Author Leon-Montiel, Roberto de J.
Kassal, Ivan
Torres, Juan P.
Title Importance of excitation and trapping conditions in photosynthetic environment-assisted energy transport
Journal name Journal of Physical Chemistry B   Check publisher's open access policy
ISSN 1520-6106
1520-5207
Publication date 2014-09-11
Year available 2014
Sub-type Article (original research)
DOI 10.1021/jp505179h
Open Access Status
Volume 118
Issue 36
Start page 10588
End page 10594
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2015
Language eng
Abstract It has been argued that excitonic energy transport in photosynthetic complexes is efficient because of a balance between coherent evolution and decoherence, a phenomenon called environment-assisted quantum transport (ENAQT). Studies of ENAQT have usually assumed that the excitation is initially localized on a particular chromophore, and that it is transferred to a reaction center through a similarly localized trap. However, these assumptions are not physically accurate. We show that more realistic models of excitation and trapping can lead to very different predictions about the importance of ENAQT. In particular, although ENAQT is a robust effect if one assumes a localized trap, its effect can be negligible if the trapping is more accurately modeled as Förster transfer to a reaction center. Our results call into question the suggested role of ENAQT in the photosynthetic process of green sulfur bacteria and highlight the subtleties associated with drawing lessons for designing biomimetic light-harvesting complexes.
Keyword Green sulfur bacteria
Fmo antenna protein
Quantum coherence
Physiological temperature
Chlorobaculum-Tepidum
Light
Complex
Dynamics
System
Chlorosomes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
 
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