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Essential Differences between the Core and Peripheral Antenna Excitons in Photosynthetic Purple Bacteria Revealed by High-Pressure Spectroscopy

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Advances in High Pressure Bioscience and Biotechnology II

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Abstract

The absorption and emission spectra of excitons in LH1 and LH2 antenna complexes from the photosynthetic purple bacterium Rhodobacter sphaeroides have been studied under hydrostatic pressure varying between ambient pressure and 6 kbar. The observations performed at low (80 K) and physiological temperatures reveal distinctive differences in spectral response of LH1 and LH2 excitons to compression. Analysis shows that unlike in LH2 where small-radius self-trapped excitons exist, the self-trapping is much less developed in LH1. This is probably because the resonant exciton coupling in the LH1 complex is relatively stronger at similar exciton-lattice coupling energy.

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Author information

Authors and Affiliations

  1. Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia

    Arvi Freiberg, Aleksandr Ellervee, Ants Lõhmus, Rünno Lõhmus, Kõu Timpmann & Gediminas Trinkunas

  2. Institute of Physics, A. Gostauto 12, Vilnius 2600, Lithuania, Estonia

    Gediminas Trinkunas

Authors
  1. Arvi Freiberg
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  2. Aleksandr Ellervee
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  3. Ants Lõhmus
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  4. Rünno Lõhmus
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  5. Kõu Timpmann
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  6. Gediminas Trinkunas
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Editor information

Editors and Affiliations

  1. Department of Chemistry, Physical Chemistry I, University of Dortmund, Otto-Hahn-Str. 6, 44227, Dortmund, Germany

    Roland Winter

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© 2003 Springer-Verlag Berlin Heidelberg

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Freiberg, A., Ellervee, A., Lõhmus, A., Lõhmus, R., Timpmann, K., Trinkunas, G. (2003). Essential Differences between the Core and Peripheral Antenna Excitons in Photosynthetic Purple Bacteria Revealed by High-Pressure Spectroscopy. In: Winter, R. (eds) Advances in High Pressure Bioscience and Biotechnology II. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-05613-4_5

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  • DOI: https://doi.org/10.1007/978-3-662-05613-4_5

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-05674-1

  • Online ISBN: 978-3-662-05613-4

  • eBook Packages: Springer Book Archive

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