Excited-State Dynamics of Monomeric and Aggregated Carotenoid 8 '-Apo-beta-carotenal

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F12%3A43884197" target="_blank" >RIV/60076658:12310/12:43884197 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/jp310140k" target="_blank" >http://dx.doi.org/10.1021/jp310140k</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/jp310140k" target="_blank" >10.1021/jp310140k</a>

Result language
angličtina
Original language name
Excited-State Dynamics of Monomeric and Aggregated Carotenoid 8 '-Apo-beta-carotenal
Original language description
Excited-state properties of monomeric and aggregated carbonyl carotenoid 8'-apo-beta-carotenal were studied by means of femtosecond transient absorption spectroscopy. For monomers, the polarity-dependent behavior characteristic of carotenoids with conjugated carbonyl group was observed. In n-hexane the S, lifetime is 25 ps, but it is shortened to 8 ps in methanol. This shortening is accompanied by the appearance of new spectral bands in transient absorption spectrum. On the basis of analysis of the transient absorption spectra of monomeric 8'-apo-beta-carotenal in n-hexane and methanol, we propose that the polarity-induced spectral bands are due to the S-1(A(g)(-))-S-3(A(g)(+)) transition, which is enhanced upon breaking the symmetry of the molecule. This symmetry breaking is caused by the conjugated carbonyl group; it is much stronger in polar solvents where the S, state gains significant charge-transfer character. Upon addition of water to methanol solution of 8'-apo-beta-carotenal w
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
BO - Biophysics
OECD FORD branch
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Project
<a href="/en/project/GA202%2F09%2F1330" target="_blank" >GA202/09/1330: Excited state properties of carotenoid aggregates</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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