Ultrafast excitation energy transfer and exciton. Exciton annihilation processes in isolated light harvesting complexes of photosystem II (LHC II) from spinach

T. Bittner, K. D. Irrgang, G. Renger, Michael R Wasielewski

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Abstract

Excitation energy transfer and exciton-exciton annihilation in the isolated light-harvesting chlorophyll alb protein complex of spinach photosystem II (LHC II) has been studied by two-color absorption difference spectroscopy with femtosecond time resolution. The kinetic curves of the transient absorption changes at 680 nm show a remarkable intensity dependence which is ascribed to exciton-exciton annihilation. It is concluded that annihilation processes preferably occur among excited singlet states of Chl a molecules.

Original languageEnglish
Pages (from-to)11821-11826
Number of pages6
JournalJournal of Physical Chemistry
Volume98
Issue number46
Publication statusPublished - Jan 1 1994

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ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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