Photosynthetic Light Harvesting by Carotenoids: Detection of an Intermediate Excited State-Reference-Cited by-同舟云学术

Photosynthetic Light Harvesting by Carotenoids: Detection of an Intermediate Excited State

Published:2002-12-20 Issue:5602 Volume:298 Page:2395-2398
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Cerullo G.¹,Polli D.¹,Lanzani G.¹,De Silvestri S.¹,Hashimoto H.²,Cogdell R. J.²

Affiliation:

1. National Laboratory for Ultrafast and Ultraintense Optical Science (INFM), Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy.

2. Division of Biochemistry and Molecular Biology, University of Glasgow, Glasgow, UK.

Abstract

We present the first direct evidence of the presence of an intermediate singlet excited state (S x ) mediating the internal conversion from S 2 to S 1 in carotenoids. The S 2 to S x transition is extremely fast and is completed within approximately 50 femtoseconds. These results require a reassessment of the energy transfer pathways from carotenoids to chlorophylls in the primary step of photosynthesis.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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