Electronic excitation transport in core antennae of enriched photosystem I particles from spinach chloroplasts

Journal Article · Thu Oct 20 00:00:00 EDT 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100332a054· OSTI ID:5994232

Causgrove, T P; Yang, S; Struve, W S

The polarized photobleaching recovery of PSI-60 particles enriched in iron-sulfur protein and P700 was monitored with approx. 2-ps resolution at 665, 670, 675, and 681 nm. Considerable residual anisotropy appears at long times, proving that local ordering exists in the Chl a-protein core antenna of PSI-60. At these four wavelengths, the polarization decays with mean lifetimes between 2.9 and 6.6 ps. This slow time scale suggests that the depolarization accompanies electronic excitation transport between clusters of Chl a chromophores rather than between individual nearest-neighbor chromophores.

• Research Organization: Iowa State Univ., Ames (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5994232
• Journal Information: J. Phys. Chem.; (United States), Vol. 92:21
• Country of Publication: United States
• Language: English

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PHYSICAL AND ANALYTICAL CHEMISTRY
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ENERGY-LEVEL TRANSITIONS
ENERGY TRANSFER
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LIFETIME
PHOTOSYNTHETIC BACTERIA
POLARIZATION
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FOOD
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NUMERICAL DATA
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