Cited by 203Spectroscopy and Quantum Chemical StudiesPhotosynthetic Processes and MechanismsPhotochemistry and Electron Transfer Studies

Pathways of Energy Flow in LHCII from Two-Dimensional Electronic Spectroscopy

Schlau-Cohen, Gabriela S., Calhoun, Tessa R., Ginsberg, Naomi S., Read, Elizabeth L., Ballottari, Matteo, Bassi, Roberto, van Grondelle, Rienk, Fleming, Graham R.·2009·The Journal of Physical Chemistry B

Abstract

Photosynthetic light-harvesting complexes absorb energy and guide photoexcitations to reaction centers with speed and efficacy that produce near-perfect efficiency. Light harvesting complex II (LHCII) is the most abundant light-harvesting complex and is responsible for absorbing the majority of light energy in plants. We apply two-dimensional electronic spectroscopy to examine energy flow in LHCII. This technique allows for direct mapping of excitation energy pathways as a function of absorption and emission wavelength. The experimental and theoretical results reveal that excitation energy transfers through the complex on three time scales: previously unobserved sub-100 fs relaxation through spatially overlapping states, several hundred femtosecond transfer between nearby chlorophylls, and picosecond energy transfer steps between layers of pigments. All energy is observed to collect into the energetically lowest and most delocalized states, which serve as exit sites. We examine the angular distribution of optimal energy transfer produced by this delocalized electronic structure and discuss how it facilitates the exit step in which the energy moves from LHCII to other complexes toward the reaction center.

Integrity signals

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Crossref · 10.1021/jp9066586

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  • In 2009, similar oscillatory signals were revealed for the main light-harvesting complex of higher plants (LHCII) and were interpreted as quantum-coherent energy transfer.

    “In 2009, similar oscillatory signals were revealed for the main light-harvesting complex of higher plants (LHCII) and were interpreted as quantum-coherent energy transfer [43].”

    From The future of quantum biology (2018) · cites this paper as [43]

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Authors
Schlau-Cohen, G. S., Calhoun, T. R., Ginsberg, N. S., Read, E. L., Ballottari, M., Bassi, R., van Grondelle, R., & Fleming, G. R.
Affiliations
  • Department of Chemistry, University of California, Berkeley, California 94720, Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Dipartimento di Biotecnologie, Facoltà di Scienze, Universitá di Verona, Strada Le Grazie, I-37134 Verona, Italia, and Department of Biophysics, Division of Physics and Astronomy, Faculty of Sciences, Vrije University Amsterdam, NL-1081 HV Amsterdam, The Netherlands
  • University of Verona (IT)
Corresponding author
Fleming, Graham R.
Venue
The Journal of Physical Chemistry B
Published
2009-10-26
Volume
113
Issue
46
Pages
15352-15363
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W2064204909
Cited by
203
References
35
Citations by year
2026: 7 · 2025: 8 · 2024: 9 · 2023: 7 · 2022: 12 · 2021: 7 · 2020: 14 · 2019: 9 · 2018: 11 · 2017: 10 · 2016: 10 · 2015: 20 · 2014: 15 · 2013: 16 · 2012: 14
FWCI
8.91
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Physical Chemistry B (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
Keywords
light-harvesting complex II, energy transfer pathways, excitation energy transfer, chlorophyll, two-dimensional electronic spectroscopy, delocalized electronic states, photosynthetic light harvesting, femtosecond relaxation
MeSH terms
Absorption, Chlorophyll, Energy Transfer, Light, Photosynthesis, Light-Harvesting Protein Complexes, Photoelectron Spectroscopy

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