Superradiance of bacteriochlorophyll c aggregates in chlorosomes of green photosynthetic bacteria

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43903427" target="_blank" >RIV/60076658:12310/21:43903427 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/21:10430436 RIV/60077344:_____/21:00559500

Result on the web

<a href="https://www.nature.com/articles/s41598-021-87664-3" target="_blank" >https://www.nature.com/articles/s41598-021-87664-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-021-87664-3" target="_blank" >10.1038/s41598-021-87664-3</a>

Result language

angličtina

Original language name

Superradiance of bacteriochlorophyll c aggregates in chlorosomes of green photosynthetic bacteria

Original language description

Chlorosomes are the main light-harvesting complexes of green photosynthetic bacteria that are adapted to a phototrophic life at low-light conditions. They contain a large number of bacteriochlorophyll c, d, or e molecules organized in self-assembling aggregates. Tight packing of the pigments results in strong excitonic interactions between the monomers, which leads to a redshift of the absorption spectra and excitation delocalization. Due to the large amount of disorder present in chlorosomes, the extent of delocalization is limited and further decreases in time after excitation. In this work we address the question whether the excitonic interactions between the bacteriochlorophyll c molecules are strong enough to maintain some extent of delocalization even after exciton relaxation. That would manifest itself by collective spontaneous emission, so-called superradiance. We show that despite a very low fluorescence quantum yield and short excited state lifetime, both caused by the aggregation, chlorosomes indeed exhibit superradiance. The emission occurs from states delocalized over at least two molecules. In other words, the dipole strength of the emissive states is larger than for a bacteriochlorophyll c monomer. This represents an important functional mechanism increasing the probability of excitation energy transfer that is vital at low-light conditions. Similar behaviour was observed also in one type of artificial aggregates, and this may be beneficial for their potential use in artificial photosynthesis.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10610 - Biophysics

Project

<a href="/en/project/GA20-01159S" target="_blank" >GA20-01159S: Interactions between pigments for efficient light harvesting and photoprotection in photosynthesis</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific Reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

11

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

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UT code for WoS article

000641794400002

EID of the result in the Scopus database

2-s2.0-85104422037