Photoconversion of chlorophylls in higher-plant CP43 characterized by persistent spectral hole burning at 1.7 K.

Research output: Contribution to journalArticle


The chorophyll-protein complex CP43 is a proximal-antenna subunit important for excitation energy transfers from peripheral light-harvesting antenna to the Photosystem II (PSII) reaction centre. We report persistent spectral hole burning at 1.7 K in the Qy(0,0) origin and Qy(1,0) vibrational satellite bands of chorophyll a (chl a) in CP43 isolated from higher plants. The isolated CP43 is known to possess two quasi-degenerate 'red' trap states. We find persistent hole burning in the primary trap exhibits a photoconversion property, with a photoproduct located well outside its inhomogeneous distribution. This photoconversion of trap chl a molecules also occurs with non-selective white light illumination. The contribution of the 'red' states to CP43 absorption is discussed.


  • Joseph L Hughes
  • Barry J Prince
  • Sindra Peterson Årsköld
  • Elmars Krausz
  • Ron J Pace
  • Rafael Picorel
  • Mikael Seibert
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Biological Sciences


  • photoproduct, vibration, CP43, hole burning
Original languageEnglish
Pages (from-to)131-136
JournalJournal of Luminescence
Issue number1-4
Publication statusPublished - 2004
Publication categoryResearch