Unraveling exciton relaxation and energy transfer in LH2 photosynthetic antennas

Kõu Timpmann, Neal Woodbury, Arvi Freiberg

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

A long-standing uncertainty has been resolved concerning the early time evolution of light excitations in LH2 antennas of purple photosynthetic bacteria. Both isolated and native membrane-embedded LH2 antenna complexes were comprehensively studied using femtosecond time-resolved transient absorption spectroscopy together with conventional absorption and fluorescence emission spectroscopies at low temperatures. The results show that exciton relaxation within isolated LH2 complexes is characterized by subpicosecond time constants, while spectral evolution associated with energy transfer between the antenna complexes in photosynthetic membranes is characterized by time constants ≥ 1 ps.

Original languageEnglish (US)
Pages (from-to)9770-9771
Number of pages2
JournalJournal of Physical Chemistry B
Volume104
Issue number42
DOIs
StatePublished - Oct 26 2000

ASJC Scopus subject areas

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

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