Different Response of Carbonyl Carotenoids to Solvent Proticity Helps To Estimate Structure of the Unknown Carotenoid from Chromera velia

0449354 - BC 2016 RIV US eng J - Journal Article
Kesan, G. - Durchan, Milan - Tichý, Josef - Minofar, Babak - Kuznetsova, V. - Fuciman, M. - Šlouf, V. - Parlak, C. - Polívka, Tomáš
Different Response of Carbonyl Carotenoids to Solvent Proticity Helps To Estimate Structure of the Unknown Carotenoid from Chromera velia.
Journal of Physical Chemistry B. Roč. 119, č. 39 (2015), s. 12653-12663. ISSN 1520-6106. E-ISSN 1520-5207
R&D Projects: GA ČR(CZ) GAP205/11/1164; GA ČR GBP501/12/G055
Institutional support: RVO:60077344 ; RVO:67179843
Keywords : Charge-transfer state * Time-resolved spectroscopy * Pump-probe spectroscopy * Apicomplexan parasites
Subject RIV: BO - Biophysics; BO - Biophysics (UEK-B)
Impact factor: 3.187, year: 2015

In order to estimate the possible structure of the unknown carbonyl carotenoid related to isofucoxanthin from Chromera velia denoted as isofucoxanthin-like carotenoid (Ifx-l), we employed steady-state and ultrafast time-resolved spectroscopic techniques to investigate spectroscopic properties of Ifx-l in various solvents. The results were compared with those measured for related carotenoids with luiown structure: fucoxanthin (Fx) and isofucoxanthin (la). The experimental data were complemented by quantum chemistry calculations and molecular modeling. The data show that Ifx-l must have longer effective conjugation length than Ifx. Yet, the magnitude of polarity-dependent changes in Ifx-l is larger than for Ifx suggesting significant differences in structure of these two carotenoids. The most interesting spectroscopic feature of Ifx-1 is its response to solvent proticity.
Permanent Link: http://hdl.handle.net/11104/0251013