Ultrafast Dynamics of Long Homologues of Carotenoid Zeaxanthin

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F15%3A43889040" target="_blank" >RIV/60076658:12310/15:43889040 - isvavai.cz</a>
Result on the web
<a href="http://pubs.acs.org/doi/10.1021/acs.jpca.5b08460" target="_blank" >http://pubs.acs.org/doi/10.1021/acs.jpca.5b08460</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpca.5b08460" target="_blank" >10.1021/acs.jpca.5b08460</a>

Result language
angličtina
Original language name
Ultrafast Dynamics of Long Homologues of Carotenoid Zeaxanthin
Original language description
Three zeaxanthin homologues with conjugation lengths N of 15, 19, and 23 denoted as Z15, Z19, and Z23 were studied by femtosecond transient absorption spectroscopy, and the results were compared to those obtained for zeaxanthin (Z11). The energies of S2decrease from 20 450 cm(-1) (Z11) to 18 280 cm(-1) (Z15), 17?095 cm(-1) (Z19), and 16?560 cm(-1) (Z23). Fitting the N dependence of the S-2 energies allowed the estimation of [Formula: see text], the S-2 energy of a hypothetical infinite zeaxanthin, to be similar to 14?000 cm(-1). Exciting the 0-0 band of the S-2 state produces characteristic S-1-S-n spectral profiles in transient absorption spectra with maxima at 556 nm (Z11), 630 nm (Z15), 690 nm (Z19), and 740 nm (Z23). The red shift of the S-1-S-n transition with increasing conjugation length is caused by a decrease in the S-1 state energy, resulting in S-1 lifetimes of 9 ps (Z11), 0.9 ps (Z15), 0.35 ps (Z19), and 0.19 ps (Z23). Essentially the same lifetimes were obtained after exc
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CE - Biochemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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