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

Joseph L. Hughes, Barry J. Prince, Sindra Peterson Arskold, Elmars Krausz*, Ron J. Pace, Rafael Picorel, Michael Seibert

*Corresponding author for this work

    Research output: Contribution to journalConference articlepeer-review

    26 Citations (Scopus)

    Abstract

    The chlorophyll-protein complex CP43 is a proximal-antenna subunit important for excitation energy transfer from peripheral light-harvesting antenna to the Photosystem II (PSII) reaction centre. We report persistent spectral hole burning at 1.7K in the Qy(0,0) origin and Q y(1,0) vibrational satellite bands of chlorophyll 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.

    Original languageEnglish
    Pages (from-to)131-136
    Number of pages6
    JournalJournal of Luminescence
    Volume108
    Issue number1-4
    DOIs
    Publication statusPublished - Jun 2004
    EventProceedings of the Fourtheenth International Conference - Christchurch, New Zealand
    Duration: 3 Aug 20038 Aug 2003

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