Time-resolved two-photon spectroscopy of carotenoids

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43899145" target="_blank" >RIV/60076658:12310/19:43899145 - isvavai.cz</a>
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0301010419300539?token=385E0CD6C59DE64B8E185BBD5EABBA373BE05B638F973233980F0E4E6BDA9640AFB797412A12C8915DB28E64885802B9" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0301010419300539?token=385E0CD6C59DE64B8E185BBD5EABBA373BE05B638F973233980F0E4E6BDA9640AFB797412A12C8915DB28E64885802B9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.chemphys.2019.02.023" target="_blank" >10.1016/j.chemphys.2019.02.023</a>

Result language
angličtina
Original language name
Time-resolved two-photon spectroscopy of carotenoids
Original language description
We have developed an experimental set-up allowing to measure transient absorption spectra of carotenoids after two-photon excitation (2PE), thereby exciting the lowest excited state S-1 directly. We have compared 2PE and 1PE data of three carotenoids, lycopene, beta-carotene, and neurosporene. Compared to 'standard' 1PE, the transient absorption spectra of all three carotenoids are broader after 2PE, suggesting larger conformational disorder induced by direct excitation of the S-1 state. Also, 2PE generates slightly longer S-1 lifetimes compared to 1PE, which is most likely due to increased magnitude of the S* signal after 2PE. The difference in the S* signal magnitude is explained by a different subsets of conformers excited by 1PE and 2PE.
Czech name
—
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
—
OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
<a href="/en/project/GA16-10417S" target="_blank" >GA16-10417S: Carotenoids in light-harvesting and photoprotection – new approaches using multipulse femtosecond spectroscopy</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

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