Electron-vibrational coupling decreases trapping by low-energy states in photosynthesis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10406642" target="_blank" >RIV/00216208:11320/19:10406642 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=N40ai_83j5" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=N40ai_83j5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.chemphys.2019.02.011" target="_blank" >10.1016/j.chemphys.2019.02.011</a>

Result language
angličtina
Original language name
Electron-vibrational coupling decreases trapping by low-energy states in photosynthesis
Original language description
In photosynthetic light harvesting, states with energy well below that needed for charge separation can be found in abundance. They do not hinder the quantum efficiency of the primary processes; on the contrary, they can be highly functional, extending the absorption towards the red. Although many properties of these states are well described based on spectroscopic and theoretical studies, the physical mechanisms underlying their working are not known. Here we propose a mechanism which utilizes high-frequency vibrations of the photosynthetic pigments and the combined spatio-energetic aspect of the excitation dynamics. We present numerical calculations of the excitation dynamics in explicit electron-vibrational basis, with parameters based on photosynthetic complexes such as the Lhca4 complex of higher plants. The electron-vibrational states have two roles. For the trapped, low-energy excitation they provide a thermally populated ladder out of the trap. And for the high-energy excitation they provide local-bath states, effectively forming a bridge over the trap.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10610 - Biophysics

Project
<a href="/en/project/GA17-22160S" target="_blank" >GA17-22160S: Quantum theory of excitation energy transfer and advanced optical spectroscopy: from small dye molecules to light-harvesting complexes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)