Time-resolved two-photon spectroscopy of carotenoids

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Time-resolved two-photon spectroscopy of carotenoids

Popis výsledku v původním jazyce

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 &apos;standard&apos; 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.

Název v anglickém jazyce

Time-resolved two-photon spectroscopy of carotenoids

Popis výsledku anglicky

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 &apos;standard&apos; 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

<a href="/cs/project/GA16-10417S" target="_blank" >GA16-10417S: Světlosběrné a fotoprotektivní funkce karotenoidů - nové přístupy pomocí multipulsní femtosekundové spektroskopie</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Chemical Physics

ISSN

0301-0104

e-ISSN

—

Svazek periodika

522

Číslo periodika v rámci svazku

JUN 1 2019

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

171-177

Kód UT WoS článku

000466713000024

EID výsledku v databázi Scopus

2-s2.0-85062809823