Femtosecond transient spectroscopy and excitonic interactions in Photosystem I

Article Abstract:

Femtosecond transient absorption spectroscopy, with selective excitation at 700, 695 and 710 nm, were used to investigate the excitonic interactions of the pigments in the Photosystem I core.

Research and Development in the Physical, Engineering, and Life Sciences, Chemistry, Chemical research, Chemistry, Physical and theoretical, Physical chemistry

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Energy coupling in the PSI-LHCI supercomplex from the green alga Chlamydomonas reinhardtii

Article Abstract:

Energy transfer and trapping in the photosystem I (PSI)-LHCI supercomplex from the green alga Chlamydomonas reinhardtii have been studied using femtosecond transient absorption and piosecond fluorescence spectroscopy at room temperature. The energy coupling in the PSI-LHCI supercomplex from the green alga Chlamydomonas reinhardtii is discussed.

Energy transfer, Green algae, Chlamydomonas

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Energy redistribution in heterodimeric light-harvesting complex LHCI-730 of photosystem I

Article Abstract:

Research was conducted to examine the time-resolved fluorescence of the monomeric subunits of the light-harvesting complex (LHC) of photosystem I and the LHC I-730 complex. An additional 30-50 ps energy-transfer component was found in LHC I-730 heterodimers. The spectral overlap of the absorption of long wavelength spectral forms of Chl a in Lhca4 and the fluorescence of Lhca1 indicates that the energy transfer is most possibly through the Forster inductive resonance mechanism.

Measurement, Algae, Carrier proteins, Transport proteins, Fluorescence, Apoenzymes

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