Porphyrin and pyropheophorbide phosphorescence in synthetic molecules that mimic photosynthetic triplet energy transfer

A. A. Krasnovsky, M. E. Bashtanov, N. N. Drozdova, P. A. Liddell, Ana L Moore, Thomas A Moore, John Devens Gust

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Phosphorescence emission and excitation spectra and triplet lifetimes at 77 K have been obtained for a carotenoid-porphyrin-pyropheophorbide triad model for the photosynthetic triplet energy transfer relay and seven porphyrin and pyropheophorbide model compounds including methyl pyropheophorbide-a. The results confirm that triplet energy from the pyropheophorbide moiety of the triad is transferred to the carotenoid by a triplet energy relay involving endergonic transfer from the pyropheophorbide to the porphyrin, whose triplet is rapidly quenched by the carotenoid polyene.

Original languageEnglish
Pages (from-to)157-161
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Issue number2-3
Publication statusPublished - Jan 22 1997



  • Phosphorescence
  • Photosynthesis
  • Porphyrin
  • Pyropheophorbide
  • Triplet energy transfer

ASJC Scopus subject areas

  • Bioengineering
  • Physical and Theoretical Chemistry

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