Excited state dynamics of the carotenoid peridinin

T. Polívka; D. Zigmantas; R. G. Hiller; V. Sundström

doi:10.1016/B978-044451656-5/50087-6

Excited state dynamics of the carotenoid peridinin

T. Polívka^*, D. Zigmantas, R. G. Hiller, V. Sundström

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

1 Citation (Scopus)

Abstract

Carotenoids play a number of roles in living organisms. In addition to their well-know light-harvesting function in photosynthesis, they have also photoprotective and antioxidative functions in various physiological systems. Studies of dynamics of carotenoid excited states have established the following scheme: after excitation of a carotenoid to its S₂ state (1Bu⁺), a fast relaxation to the Si state (2Ag^-) occurs on a time scale of 50-300 fs. The S₁ state relaxes to its ground state S₀ on the time scale of 1-300 ps. Peridinin is a highly substituted carotenoid occurring in some dinoflagellates where it is the principle carotenoid of the water soluble light-harvesting peridinin-chlorophyll-protein (PCP), whose structure has been resolved to 2.0 A. The PCP complex exhibits an exceptional stoichiometry of 8 peridinin and 2 chlorophyll a (Chl-a) molecules. This, together with the unusual carotenoid structure, has initiated several studies focusing on spectroscopic properties of peridinin that revealed unique photo-physical properties of peridinin, are discussed in this chapter.

Original language	English
Title of host publication	Femtochemistry and femtobiology
Subtitle of host publication	Ultrafast events in molecular science
Editors	Monique M. Martin, James T. Hynes
Place of Publication	Amsterdam
Publisher	Elsevier
Pages	445-452
Number of pages	8
ISBN (Electronic)	9780080506265
ISBN (Print)	9780444516565
DOIs	https://doi.org/10.1016/B978-044451656-5/50087-6
Publication status	Published - 16 Apr 2004
Event	Ultrafast Events in Molecular Science: 6th International Conference on Femtochemistry - Maison de la Chimie, Paris, France Duration: 6 Jul 2003 → 10 Jul 2003

Conference

Conference	Ultrafast Events in Molecular Science
Country/Territory	France
City	Paris
Period	6/07/03 → 10/07/03

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title = "Excited state dynamics of the carotenoid peridinin",

abstract = "Carotenoids play a number of roles in living organisms. In addition to their well-know light-harvesting function in photosynthesis, they have also photoprotective and antioxidative functions in various physiological systems. Studies of dynamics of carotenoid excited states have established the following scheme: after excitation of a carotenoid to its S2 state (1Bu+), a fast relaxation to the Si state (2Ag-) occurs on a time scale of 50-300 fs. The S1 state relaxes to its ground state S0 on the time scale of 1-300 ps. Peridinin is a highly substituted carotenoid occurring in some dinoflagellates where it is the principle carotenoid of the water soluble light-harvesting peridinin-chlorophyll-protein (PCP), whose structure has been resolved to 2.0 A. The PCP complex exhibits an exceptional stoichiometry of 8 peridinin and 2 chlorophyll a (Chl-a) molecules. This, together with the unusual carotenoid structure, has initiated several studies focusing on spectroscopic properties of peridinin that revealed unique photo-physical properties of peridinin, are discussed in this chapter.",

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AU - Zigmantas, D.

AU - Hiller, R. G.

AU - Sundström, V.

PY - 2004/4/16

Y1 - 2004/4/16

N2 - Carotenoids play a number of roles in living organisms. In addition to their well-know light-harvesting function in photosynthesis, they have also photoprotective and antioxidative functions in various physiological systems. Studies of dynamics of carotenoid excited states have established the following scheme: after excitation of a carotenoid to its S2 state (1Bu+), a fast relaxation to the Si state (2Ag-) occurs on a time scale of 50-300 fs. The S1 state relaxes to its ground state S0 on the time scale of 1-300 ps. Peridinin is a highly substituted carotenoid occurring in some dinoflagellates where it is the principle carotenoid of the water soluble light-harvesting peridinin-chlorophyll-protein (PCP), whose structure has been resolved to 2.0 A. The PCP complex exhibits an exceptional stoichiometry of 8 peridinin and 2 chlorophyll a (Chl-a) molecules. This, together with the unusual carotenoid structure, has initiated several studies focusing on spectroscopic properties of peridinin that revealed unique photo-physical properties of peridinin, are discussed in this chapter.

AB - Carotenoids play a number of roles in living organisms. In addition to their well-know light-harvesting function in photosynthesis, they have also photoprotective and antioxidative functions in various physiological systems. Studies of dynamics of carotenoid excited states have established the following scheme: after excitation of a carotenoid to its S2 state (1Bu+), a fast relaxation to the Si state (2Ag-) occurs on a time scale of 50-300 fs. The S1 state relaxes to its ground state S0 on the time scale of 1-300 ps. Peridinin is a highly substituted carotenoid occurring in some dinoflagellates where it is the principle carotenoid of the water soluble light-harvesting peridinin-chlorophyll-protein (PCP), whose structure has been resolved to 2.0 A. The PCP complex exhibits an exceptional stoichiometry of 8 peridinin and 2 chlorophyll a (Chl-a) molecules. This, together with the unusual carotenoid structure, has initiated several studies focusing on spectroscopic properties of peridinin that revealed unique photo-physical properties of peridinin, are discussed in this chapter.

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Y2 - 6 July 2003 through 10 July 2003

ER -

Excited state dynamics of the carotenoid peridinin

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