Title: Charge separation kinetics in isolated photosynthetic reaction centers of chloroflexus-aurantiacus (with qa reduced) at low-temperatures
Authors: Schweitzer, Gerd ×
Hucke, M
Griebenow, K
Muller, Mg
Holzwarth, Ar #
Issue Date: Jan-1992
Publisher: Elsevier science bv
Series Title: Chemical Physics Letters vol:190 issue:1-2 pages:149-154
Abstract: The picosecond fluorescence kinetics of closed (quinone acceptor Q(A) reduced) reaction centers isolated from the phototrophic bacterium Chloroflexus aurantiacus shows time constants of almost-equal-to 20 and almost-equal-to 300 ps (amplitude ratio almost-equal-to 1:1), which are nearly independent of temperature (7 to 80 K). Assuming a three-state kinetic model, we tested various assignments of the kinetics to the electron transfer processes. Only two of these assignments seem to be physically reasonable. One of these includes a fast reversible electron transfer between P* and H(M), the pheophytin(s) in the M branch of the reaction center which up to now has been considered virtually inactive in electron transfer. The other possible model involves the formation of a monomeric bacteriochlorophyll anion.
ISSN: 0009-2614
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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