Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12640%2F10%3A00012163" target="_blank" >RIV/60076658:12640/10:00012163 - isvavai.cz</a>

Alternative codes found

RIV/60077344:_____/10:00355284

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Ultrafast dynamics of hydrophilic carbonyl carotenoids - Relation between structure and excited-state properties in polar solvents

Original language description

We present a study of excited-state dynamics of water-soluble carbonyl carotenoids, crocin, norbixin, and astalysine in solvents with different polarity. While no polarity effects were observed in 2-propanol and methanol, polarity-induced lifetime shortening has been detected in water. For crocin and astalysine the S-1 lifetime decreases from 135 ps to 61 ps (crocin), and from 4 ps to 2.2 ps (astalysine) when going from methanol to water. The S-1 lifetime of norbixin is within the 15-18 ps range in allsolvents, an effect attributed to its carboxylic group, which isolates the carbonyl group from the rest of conjugation. No spectral bands attributable to the intramolecular charge transfer (ICT) state have been found in any transient absorption spectra.The ICT-S-n transition is made forbidden, we suggest, by the symmetric location of the conjugated carbonyl groups. In astalysine, we have found a clear signature of the S* state with a life-time of 7 ps (methanol) and 6.1 ps (water).

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BO - Biophysics

OECD FORD branch

—

Project

<a href="/en/project/GA202%2F09%2F1330" target="_blank" >GA202/09/1330: Excited state properties of carotenoid aggregates</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2010

Confidentiality

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

Name of the periodical

Chemical Physics

ISSN

0301-0104

e-ISSN

—

Volume of the periodical

373

Issue of the periodical within the volume

1-2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

—

UT code for WoS article

000280065100010

EID of the result in the Scopus database

—