Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • The Thirteenth International Conference on Ultrafast Phenomena
  • 2002 OSA Technical Digest Series (Optica Publishing Group, 2002),
  • paper WD39
  • https://doi.org/10.1364/UP.2002.WD39

Energy relaxation of carotenoids in solution and in LH2 complexes studied with sub-10-fs temporal resolution

Not Accessible

Your library or personal account may give you access


Carotenoids are among the most investigated molecules in organic physics and chemistry [1]. They perform several vital functions in photosynthetic systems: (i) light harvesting, by absorbing energy in the blue-green region and transferring it to the chlorophylls with very high efficiency; (ii) photoprotection via quenching of the chlorophyll triplet states; (iii) singlet oxygen scavenging. In carotenoids both the ground state (S0) and the first excited state (S1) possess Ag character (according to the approximate C2h symmetry), while the second excited state (S2) possesses Bu symmetry. Therefore only the S0→S2 transition is optically allowed; however, after photoexcitation, an ultrafast internal conversion (IC) to S1 takes place. The dynamics of this process is important for the understanding of photosynthesis, because energy transfer from the carotenoids to the chlorophylls can take place either from S2 or from S1. The recent availability of sub-10-fs laser pulses in the visible has allowed to directly study IC in carotenoids with unprecedented time resolution [2].

© 2002 Optical Society of America

PDF Article
More Like This
Sub-20-fs study of energy relaxation in carotenoids in solution and inside light harvesting complexes

G. Cerullo, D. Polli, G. Lanzani, H. Hashimoto, and R.J. Cogdell
ThA1 International Conference on Ultrafast Phenomena (UP) 2004

Low lying carotenoid “dark” singlet states in light-harvesting complexes revealed by multi-photon fluorescence excitation spectroscopy

Alexander Betke, Dieter Leupold, Bernd Voigt, Ralf Menzel, Maria Krikunova, and Heiko Lokstein
CL4_5 The European Conference on Lasers and Electro-Optics (CLEO_Europe) 2007

Two-Photon Fluorescence Excitation Spectroscopy of Photosynthetic Pigments and Pigment-Protein Complexes

Alexander Betke, Bernd Voigt, Heiko Lokstein, and Ralf Menzel
CLEB_P10 The European Conference on Lasers and Electro-Optics (CLEO_Europe) 2011


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription

Select as filters

Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved