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Four-wave-mixing spectroscopy of peridinin in solution and in the peridinin-chlorophyll-a protein
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SYSNO ASEP 0355279 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Four-wave-mixing spectroscopy of peridinin in solution and in the peridinin-chlorophyll-a protein Author(s) Christensson, N. (SE)
Chábera, P. (CZ)
Hiller, R.G. (AU)
Pullerits, T. (SE)
Polívka, Tomáš (BC-A) RID, ORCIDNumber of authors 5 Source Title Chemical Physics. - : Elsevier - ISSN 0301-0104
Roč. 373, 1-2 (2010), s. 15-22Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords peridinin ; four-wave mixing spectroscopy ; excited-state dynamics Subject RIV BO - Biophysics CEZ AV0Z50510513 - UMBR-M, BC-A (2005-2011) UT WOS 000280065100004 DOI 10.1016/j.chemphys.2009.12.011 Annotation A model for the third order optical response of carotenoids is used to analyse transient grating and pump-probe data of peridinin in solution and bound in the peridinin-chlorophyll protein (PCP). For peridinin in solution, the transient grating signal detected at 505 nm exhibits a bi-exponential recovery whose fast phase is assigned to relaxation from the S2 state that has a lifetime of 75 +/- 25 fs. The slower, solvent-dependent rise component is assigned to equilibration of the S1/ICT state, taking place on a time scale of 0.6, and about 2.5 ps in acetontrile and benzene, respectively. These dynamics match those obtained from pump-probe measured in the spectral region of the ICT state, implying that the ICT state contributes to the signal at 505 nm. In PCP, the transient grating signal shows distinctly different kinetics, and the signal shows no recovery. This difference is explained by energy transfer from peridinin to chlorophyll-a. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2012
Number of the records: 1