Energetics and mechanisms of primary charge separation in bacterial photosynthesis. A comparative study on reaction centers of Rhodobacter sphaeroides and Chloroflexus aurantiacus
Article Abstract:
A study tested the universality of the energetics and mechanism of primary charge separation in bacterial photosynthetic reaction centers. A detailed comparison of the energetics and phenomenology of primary charge separation in the reaction center of Rhodobacter sphaeroides and Chloreflexus aurantiacus was performed. The analysis derived the radical pair energetics through highly accurate transient absorbance measurements of the spin-dependent recombination dynamics of P(+)H(sub A)(-) and the lifetime of the recombination product (super 3)P*. The findings are discussed.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Transient absorption spectroscopy of energy-transfer and trapping processes in the reaction center complex of Chlorobium tepidum
Article Abstract:
Research was conducted to examine the reaction center complexes from the green sulfur bacterium Chlorobium tepidum using picosecond absorption difference spectroscopy at room temperature. The complexes include the core proteins having the primary electron donor P840 and related core antenna pigments and some of the Fenna-Matthews-Olson antenna protein. Results demonstrate that no antenna components were seen with absorption at wavelengths longer than the primary donor.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Carotenoid and bacteriochlorophyll energy transfer in the B808-866 complex from Chloroflexus aurantiacus
Article Abstract:
Carotenoid and bacteriochlorophyll energy transfer in the B808-866 complex from Chloroflexus aurantiacus are explained. Energy transfer from the carotenoid state to the B866 Bchl a was observed and found to be ~12 - 15 % efficient.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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