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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
  • 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
  • T. Kunsel, L.M. Günther, J. Köhler, T.L.C. Jansen, J. Knoester
    Probing Size Variations of Molecular Aggregates inside Chlorosomes using Single-
    Particle Spectroscopy
    J. Chem. Phys., 155 (2021), 124310, DOI: 10.1063.5.0061529
  • T.H. Panintingjati Brotosudarmo, B. Wittmann, S. Seki, R. Fujii, J. Köhler
    Wavelength-Dependent Optical Response of Single Photosynthentic Antenna
    Complexes from Siphonous Green Alga Codium fragile
    J. Phys. Chem. Lett., 13, 7802b-7803 (2022), DOI: 10.1021/acs.jpclett.2c02416
  • I. Elvers, T. C. Nguyen-Phan, A. T. Gardiner, C. N. Hunter, R. J. Cogdell, J. Köhler
    Phasor analysis reveals multicomponent fluorescence kinetics in the LH2 comples
    from Mch. Purpuratum
    J. Phys. Chem B., 126, 10335-10346 (2022), DOI: 10.1021/acs.jpcb.2c04983

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