Low-temperature spectroscopy of bacteriochlorophyll c aggregates
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10286188" target="_blank" >RIV/00216208:11320/14:10286188 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1007/s11120-013-9955-6" target="_blank" >http://dx.doi.org/10.1007/s11120-013-9955-6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11120-013-9955-6" target="_blank" >10.1007/s11120-013-9955-6</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Low-temperature spectroscopy of bacteriochlorophyll c aggregates
Popis výsledku v původním jazyce
Chlorosomes from green photosynthetic bacteria belong to the most effective light-harvesting antennas found in nature. Quinones incorporated in bacterichlorophyll (BChl) c aggregates inside chlorosomes play an important redox-dependent photo-protection role against oxidative damage of bacterial reaction centers. Artificial BChl c aggregates with and without quinones were prepared. We applied hole-burning spectroscopy and steady-state absorption and emission techniques at 1.9 K and two different redox potentials to investigate the role of quinones and redox potential on BChl c aggregates at low temperatures. We show that quinones quench the excitation energy in a similar manner as at room temperature, yet the quenching process is not as efficient as forchlorosomes. Interestingly, our data suggest that excitation quenching partially proceeds from higher excitonic states competing with ultrafast exciton relaxation. Moreover, we obtained structure-related parameters such as reorganization
Název v anglickém jazyce
Low-temperature spectroscopy of bacteriochlorophyll c aggregates
Popis výsledku anglicky
Chlorosomes from green photosynthetic bacteria belong to the most effective light-harvesting antennas found in nature. Quinones incorporated in bacterichlorophyll (BChl) c aggregates inside chlorosomes play an important redox-dependent photo-protection role against oxidative damage of bacterial reaction centers. Artificial BChl c aggregates with and without quinones were prepared. We applied hole-burning spectroscopy and steady-state absorption and emission techniques at 1.9 K and two different redox potentials to investigate the role of quinones and redox potential on BChl c aggregates at low temperatures. We show that quinones quench the excitation energy in a similar manner as at room temperature, yet the quenching process is not as efficient as forchlorosomes. Interestingly, our data suggest that excitation quenching partially proceeds from higher excitonic states competing with ultrafast exciton relaxation. Moreover, we obtained structure-related parameters such as reorganization
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
BO - Biofyzika
OECD FORD obor
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Návaznosti výsledku
Projekt
<a href="/cs/project/GBP501%2F12%2FG055" target="_blank" >GBP501/12/G055: Centrum fotosyntetického výzkumu</a><br>
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2014
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Photosynthesis Research
ISSN
0166-8595
e-ISSN
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Svazek periodika
119
Číslo periodika v rámci svazku
3
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
8
Strana od-do
331-338
Kód UT WoS článku
000331720100007
EID výsledku v databázi Scopus
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