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

Journal Article · Thu Oct 20 04:00:00 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), Journal Name: J. Phys. Chem.; (United States) Vol. 92:21; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

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& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
DATA
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
FOOD
INFORMATION
LIFETIME
NUMERICAL DATA
PHOTOSYNTHETIC BACTERIA
PLANTS
POLARIZATION
SPINACH
VEGETABLES