Exciton self trapping in one-dimensional photosynthetic antennas

Kõu Timpmann, Zivile Katiliene, Neal Woodbury, Arvi Freiberg

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33 Scopus citations

Abstract

Experimental evidence is presented showing that excitons in circular antenna complexes from photosynthetic bacteria are dynamically self trapped in about 200 fs by coupling to nuclear vibrations. The induced deformation covers ∼20% of the complex circumference at low temperature. This self trapping, the first of its kind observed in biological systems, results in a broad fluorescence spectrum and considerably improves energy resonance between heterogeneous antenna complexes. Exciton self trapping may thus be a part of nature's strategy, increasing the speed and efficiency of energy transfer in photosynthesis.

Original languageEnglish (US)
Pages (from-to)12223-12225
Number of pages3
JournalJournal of Physical Chemistry B
Volume105
Issue number49
DOIs
StatePublished - Dec 13 2001

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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