Direct observation of energy transfer in a photosynthetic membrane: Chlorophyll b to chlorophyll a transfer in LHC

Daniel D. Eads, Ed Castner, Randall S. Alberte, Laurens Mets, Graham R. Fleming

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Abstract

Subpicosecond fluorescence upconversion has been used to measure the rate of chlorophyll b to chlorophyll a electronic energy transfer in situ within the LHC pigment proteins of Chlamydomonas reinhardtii mutant C2. The time scale of energy transfer is 0.5 ± 0.2 ps as determined from the rise time of chlorophyll a fluorescence following chlorophyll b excitation. Estimates of the energy-transfer rate based on Förster weak coupling theory are discussed.

Original languageEnglish
Pages (from-to)8271-8275
Number of pages5
JournalJournal of Physical Chemistry
Volume93
Issue number26
Publication statusPublished - 1989

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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