Ultrafast excited states dynamics of metal ion complexes of the carotenoid astaxanthin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F23%3A43906675" target="_blank" >RIV/60076658:12310/23:43906675 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1010603023002022?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1010603023002022?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotochem.2023.114737" target="_blank" >10.1016/j.jphotochem.2023.114737</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultrafast excited states dynamics of metal ion complexes of the carotenoid astaxanthin

Popis výsledku v původním jazyce

Carotenoids are natural compounds with multiple functions in biological systems. They exhibit rich photophysics that can be modified by changes in properties of their local environments. Here we present time-resolved spectroscopy data from complexes resulting from interaction of the carotenoid astaxanthin with Zn2+ and Cu2+ ions. The astaxanthin-metal complexes exhibit significant alteration of their excited-state dynamics, resulting in enhancement of the charge transfer character of the lowest excited state, S1/ICT. The S1/ICT lifetime of pure astaxanthin, 4.4 ps, is shortened to 3.9 ps and 2.6 ps for astaxanthin-Zn and astaxanthin-Cu complex, respectively. The lifetime shortening is attributed to prolongation of effective conjugation caused by interaction of metal ions with keto oxygen at the terminal rings of astaxanthin. The significant shortening of the S1/ICT lifetime of astaxanthin-Cu complex also results in observation of the S* signal, which is likely due to a hot ground state generated by rapid depopulation of excited states.

Název v anglickém jazyce

Ultrafast excited states dynamics of metal ion complexes of the carotenoid astaxanthin

Popis výsledku anglicky

Carotenoids are natural compounds with multiple functions in biological systems. They exhibit rich photophysics that can be modified by changes in properties of their local environments. Here we present time-resolved spectroscopy data from complexes resulting from interaction of the carotenoid astaxanthin with Zn2+ and Cu2+ ions. The astaxanthin-metal complexes exhibit significant alteration of their excited-state dynamics, resulting in enhancement of the charge transfer character of the lowest excited state, S1/ICT. The S1/ICT lifetime of pure astaxanthin, 4.4 ps, is shortened to 3.9 ps and 2.6 ps for astaxanthin-Zn and astaxanthin-Cu complex, respectively. The lifetime shortening is attributed to prolongation of effective conjugation caused by interaction of metal ions with keto oxygen at the terminal rings of astaxanthin. The significant shortening of the S1/ICT lifetime of astaxanthin-Cu complex also results in observation of the S* signal, which is likely due to a hot ground state generated by rapid depopulation of excited states.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GX19-28323X" target="_blank" >GX19-28323X: Vztah mezi strukturou a funkcí karotenoidů: Nové cesty k řešení nezodpovězených otázek</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

ISSN

1010-6030

e-ISSN

1873-2666

Svazek periodika

441

Číslo periodika v rámci svazku

JUL 1 2023

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

001054247200001

EID výsledku v databázi Scopus

2-s2.0-85151552327