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Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence

Understanding energetic and kinetic parameters of intermediates formed in the course of the reaction cycle (S-state cycle) of photosynthetic water oxidation is of high interest and could support the rationale designs of artificial systems for solar fuels. We use time-resolved measurements of the del...

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Detalles Bibliográficos
Autores principales: Zaharieva, Ivelina, Dau, Holger
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6450259/
https://www.ncbi.nlm.nih.gov/pubmed/30984228
http://dx.doi.org/10.3389/fpls.2019.00386
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author Zaharieva, Ivelina
Dau, Holger
author_facet Zaharieva, Ivelina
Dau, Holger
author_sort Zaharieva, Ivelina
collection PubMed
description Understanding energetic and kinetic parameters of intermediates formed in the course of the reaction cycle (S-state cycle) of photosynthetic water oxidation is of high interest and could support the rationale designs of artificial systems for solar fuels. We use time-resolved measurements of the delayed chlorophyll fluorescence to estimate rate constants, activation energies, free energy differences, and to discriminate between the enthalpic and the entropic contributions to the decrease of the Gibbs free energy of the individual transitions. Using a joint-fit simulation approach, kinetic parameters are determined for the reaction intermediates in the S-state transitions in buffers with different pH in H(2)O and in D(2)O.
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spelling pubmed-64502592019-04-12 Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence Zaharieva, Ivelina Dau, Holger Front Plant Sci Plant Science Understanding energetic and kinetic parameters of intermediates formed in the course of the reaction cycle (S-state cycle) of photosynthetic water oxidation is of high interest and could support the rationale designs of artificial systems for solar fuels. We use time-resolved measurements of the delayed chlorophyll fluorescence to estimate rate constants, activation energies, free energy differences, and to discriminate between the enthalpic and the entropic contributions to the decrease of the Gibbs free energy of the individual transitions. Using a joint-fit simulation approach, kinetic parameters are determined for the reaction intermediates in the S-state transitions in buffers with different pH in H(2)O and in D(2)O. Frontiers Media S.A. 2019-03-29 /pmc/articles/PMC6450259/ /pubmed/30984228 http://dx.doi.org/10.3389/fpls.2019.00386 Text en Copyright © 2019 Zaharieva and Dau. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Zaharieva, Ivelina
Dau, Holger
Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence
title Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence
title_full Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence
title_fullStr Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence
title_full_unstemmed Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence
title_short Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence
title_sort energetics and kinetics of s-state transitions monitored by delayed chlorophyll fluorescence
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6450259/
https://www.ncbi.nlm.nih.gov/pubmed/30984228
http://dx.doi.org/10.3389/fpls.2019.00386
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