Primary Charge Separation in Reaction Centers: Time-Resolved Spectral Features of Electric Field Induced Reduction of Quantum Yield

1992 ◽  
pp. 261-270
Author(s):  
Alexander Ogrodnik ◽  
Thomas Langenbacher ◽  
Ulrich Eberl ◽  
Martin Volk ◽  
Maria E. Michel-Beyerle
Keyword(s):  
Quantum Yield ◽  
Electric Field ◽  
Charge Separation ◽  
Reaction Centers ◽  
Spectral Features ◽  
Primary Charge Separation ◽  
Time Resolved

Electric field-induced decrease of quantum yield of charge separation in photosynthetic reaction centers

1992 ◽  
Vol 198 (6) ◽  
pp. 653-658 ◽  
Author(s):  
A. Ogrodnik ◽  
T. Langenbacher ◽  
G. Bieser ◽  
J. Siegl ◽  
U. Eberl ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Electric Field ◽  
Charge Separation ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers

scholarly journals Access to Primary Charge Separation Mechanism in Photosynthetic Reaction Centers: Anisotropic Excitation Spectra of Electric Field Modulated Fluorescence Yields

1990 ◽  
Vol 45 (6) ◽  
pp. 763-770 ◽  
Author(s):  
U. Eberl
Keyword(s):  
Electron Transfer ◽  
Electric Field ◽  
Radical Pair ◽  
Primary Electron ◽  
Reaction Centers ◽  
Separation Mechanism ◽  
Primary Charge Separation ◽  
Excitation Spectra ◽  
Primary Radical ◽  
Primary Radical Pair

AbstractTwo-step sequential and unistep, superexchange primary electron transfer form primary radical pair states which differ in the direction and magnitude of their dipole moments as revealed in the X-ray structure analysis. The direction can be measured by the excitation anisotropy of electric field induced changes of the fluorescence yield. This method determines angles between the dipole of the primary radical pair and photoselected transition moments (in absorption and emission) of cofactors in the reaction centers. Transitions particularly favourable for discrimination between the two models of primary electron transfer are discussed.

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