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Physical Institute

Spectroscopy of soft Matter group- Prof. Dr. Jürgen Köhler

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Bacterial Photosynthesis

In photosynthesis, solar radiation is absorbed by a light-harvesting apparatus and the excitation energy is then transferred efficiently to a reaction center that acts as a transducer, where the energy is used to create a charge-separated state the drives all subsequent metabolic reactions.

In our group we study the light-harvesting machinery of purple bacteria and of green-sulphur bacteria, to elucidate the character of the electronic states which lies at the heart of the fast and efficient energy transfer processes.

read more:

  • R. J. Cogdell, A. Gall and J. Köhler
    The Architecture and Function of the Light-Harvesting Apparatus of Purple Bacteria: From Single Molecules to in vivo Membranes
    Q. Rev. Biophysics 39 (2006) 227-324
  • M.F. Richter, J. Baier, R.J. Cogdell, S. Oellerich, J. Köhler
    The Influence of Symmetry on the Electronic Structure of the Photosynthetic Pigment-Protein Complexes from Purple Bacteria
    Nobel Conference: Single Molecule Spectroscopy in Chemistry, Physics and Biology; Eds. A. Gräslund, R. Rigler, J. Widengren,
    Springer Series in Chemical Physics, 96 (2010), 513-533
  • R.J. Cogdell, J. Köhler
    Sunlight, Purple Bacteria and Quantum Mechanics: How Purple Bacteria Harness Quantum Mechanics for Efficient Light Harvesting
    in: Quantum Efficiency in Complex Systems, Part I: Biomolecular systems (Semiconductor and Semimetals) eds: Weber, Würfel, Thorwart, Vol. 83 (2010) 77-94
  • L.M. Günther, M. Jendrny, E.A. Bloemsma, M. Tank, G.T. Oostergetel, D.A. Bryant, J. Knoester, J. Köhler
    Structure of Light-Harvesting Aggregates in Individual Chlorosomes
    J. Phys. Chem. B 120 (2016) 5367-5376, DOI: 10.1021/acs.jpcb.6b03718
  • A. Löhner, R. Cogdell, J. Köhler
    Contribution of Low-Temperature Single-Molecule Techniques to Structural Issues of Pigment-Protein Complexes from Photosynthetic Purple Bacteria
    J. R. Soc. Interface 15 (2017) 20170680, DOI: org/10.1098/rsif.2017.0680
  • L. M. Günther, A. Löhner, C. Reiher, T. Kunsel, T. L.C. Jansen, M. Tank, D. A. Bryant, J. Knoester, J. Köhler
    Structural Variations in Chlorosomes from Wild-Type and a bchQR Mutant of Chlorobaculum tepidum Revealed by Single-Molecule Spectroscopy
    J. Phys. Chem. B 122 (2018) 6712-6723, DOI: 10.1021/acs.jpcb.8b02875

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