Excited-State Evolution of Keto-Carotenoids after Excess Energy Excitation in the UV Region

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43903231" target="_blank" >RIV/60076658:12310/21:43903231 - isvavai.cz</a>
Alternative codes found
RIV/60077344:_____/21:00548236
Result on the web
<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cphc.202000982" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cphc.202000982</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/cphc.202000982" target="_blank" >10.1002/cphc.202000982</a>

Result language
angličtina
Original language name
Excited-State Evolution of Keto-Carotenoids after Excess Energy Excitation in the UV Region
Original language description
Carotenoids are molecules with rich photophysics that are in many biological systems involved in photoprotection. Yet, their response to excess energy excitation is only scarcely studied. Here we have explored excited state properties of three keto-carotenoids, echinenone, canthaxanthin and rhodoxanthin after excess energy excitation to a singlet state absorbing in UV. Though the basic spectral features and kinetics of S-2, hot S-1, relaxed S-1 states remain unchanged upon UV excitation, the clear increase of the S* signal is observed after excess energy excitation, associated with increased S* lifetime. A multiple origin of the S* signal, originating either from specific conformations in the S-1 state or from a non-equilibrated ground state, is confirmed in this work. We propose that the increased amount of energy stored in molecular vibrations, induced by the UV excitation, is the reason for the enhanced S* signal observed after UV excitation. Our data also suggest that a fraction of the UV excited state population may proceed through a non-sequential pathway, bypassing the S-2 state.
Czech name
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Czech description
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Type
J<sub>imp</sub> - 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/GX19-28323X" target="_blank" >GX19-28323X: Relation between structure and function of carotenoids: New pathways to answer unresolved questions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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