Effect of Isomerization on Excited-State Dynamics of Carotenoid Fucoxanthin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895489" target="_blank" >RIV/60076658:12310/17:43895489 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60077344:_____/17:00479487

Výsledek na webu

<a href="http://pubs.acs.org/doi/10.1021/acs.jpcb.7b02526" target="_blank" >http://pubs.acs.org/doi/10.1021/acs.jpcb.7b02526</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcb.7b02526" target="_blank" >10.1021/acs.jpcb.7b02526</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Isomerization on Excited-State Dynamics of Carotenoid Fucoxanthin

Popis výsledku v původním jazyce

Ultrafast transient absorption spectroscopy and single-wavelength anisotropy measurements were used to study the effect of isomerization on the excited-state properties of fucoxanthin in polar and nonpolar solvents. The excitation wavelengths were 477 nm for all-trans-fucoxanthin, and 333 and 477 nm for cis-fucoxanthin. All transient absorption spectra of the fucoxanthin isomers in polar solvents show intramolecular charge transfer (ICT) state features, typical for carbonyl carotenoids. Global analysis of the data requires an additional fitting component, originated from the presence of blue and red forms of fucoxanthin in a polar protic solvent. Here we demonstrate that the ICT state decays faster than the S-1 state, due to the significant contribution of the red form to the ICT state dynamics. The isomerization does not affect the S-1 lifetime, but induces a larger difference between the S-1- and ICT-state lifetimes in cis-fucoxanthin, which is likely-caused by alterations of ICT coupling to either the S-1 or So states; the S*-state signal is more pronounced for cis-isomers in a nonpolar solvent.

Název v anglickém jazyce

Effect of Isomerization on Excited-State Dynamics of Carotenoid Fucoxanthin

Popis výsledku anglicky

Ultrafast transient absorption spectroscopy and single-wavelength anisotropy measurements were used to study the effect of isomerization on the excited-state properties of fucoxanthin in polar and nonpolar solvents. The excitation wavelengths were 477 nm for all-trans-fucoxanthin, and 333 and 477 nm for cis-fucoxanthin. All transient absorption spectra of the fucoxanthin isomers in polar solvents show intramolecular charge transfer (ICT) state features, typical for carbonyl carotenoids. Global analysis of the data requires an additional fitting component, originated from the presence of blue and red forms of fucoxanthin in a polar protic solvent. Here we demonstrate that the ICT state decays faster than the S-1 state, due to the significant contribution of the red form to the ICT state dynamics. The isomerization does not affect the S-1 lifetime, but induces a larger difference between the S-1- and ICT-state lifetimes in cis-fucoxanthin, which is likely-caused by alterations of ICT coupling to either the S-1 or So states; the S*-state signal is more pronounced for cis-isomers in a nonpolar solvent.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10610 - Biophysics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry B

ISSN

1520-6106

e-ISSN

—

Svazek periodika

121

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

4438-4447

Kód UT WoS článku

000400881300012

EID výsledku v databázi Scopus

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