Charge Recombination Time Distributions in Photosynthetic Reaction Centers Exposed to Alternating Intervals of Photoexcitation and Dark Relaxation

2011 ◽  
Vol 115 (26) ◽  
pp. 8534-8544 ◽  
Author(s):  
Anthony J. Manzo ◽  
Alexander O. Goushcha ◽  
Nataliya M. Berezetska ◽  
Valery N. Kharkyanen ◽  
Gary W. Scott
Keyword(s):  
Charge Recombination ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Recombination Time

Charge recombination kinetics of photosynthetic reaction centers

1995 ◽  
Vol 38 (1) ◽  
pp. 25-33 ◽  
Author(s):  
A. Agostiano ◽  
L. Catucci ◽  
M. Della Monica ◽  
A. Mallardi ◽  
G. Palazzo ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Kinetics Of ◽  
Recombination Kinetics

scholarly journals Triplet Charge Recombination in Heliobacterial Reaction Centers Does Not Produce a Spin-Polarized EPR Spectrum

2017 ◽  
Vol 231 (3) ◽  
Author(s):  
Bryan Ferlez ◽  
Alessandro Agostini ◽  
Donatella Carbonera ◽  
John H. Golbeck ◽  
Art van der Est
Keyword(s):  
Magnetic Field ◽  
Radical Pair ◽  
Charge Recombination ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Epr Spectrum ◽  
Primary Radical ◽  
Spin Polarized ◽  
Primary Radical Pair

AbstractIn photosynthetic reaction centers, reduction of the secondary acceptors leads to triplet charge recombination of the primary radical pair (RP). This process is spin selective and in a magnetic field it populates only the T

scholarly journals Excitonic structure and charge separation in the heliobacterial reaction center probed by multispectral multidimensional spectroscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yin Song ◽  
Riley Sechrist ◽  
Hoang H. Nguyen ◽  
William Johnson ◽  
Darius Abramavicius ◽  
...  
Keyword(s):  
Reaction Center ◽  
Charge Separation ◽  
Electronic Spectroscopy ◽  
Spectroscopic Studies ◽  
Primary Electron ◽  
Reaction Centers ◽  
Separation Mechanism ◽  
Photosynthetic Reaction Centers ◽  
Density Analysis ◽  
Function Relationship

AbstractPhotochemical reaction centers are the engines that drive photosynthesis. The reaction center from heliobacteria (HbRC) has been proposed to most closely resemble the common ancestor of photosynthetic reaction centers, motivating a detailed understanding of its structure-function relationship. The recent elucidation of the HbRC crystal structure motivates advanced spectroscopic studies of its excitonic structure and charge separation mechanism. We perform multispectral two-dimensional electronic spectroscopy of the HbRC and corresponding numerical simulations, resolving the electronic structure and testing and refining recent excitonic models. Through extensive examination of the kinetic data by lifetime density analysis and global target analysis, we reveal that charge separation proceeds via a single pathway in which the distinct A0 chlorophyll a pigment is the primary electron acceptor. In addition, we find strong delocalization of the charge separation intermediate. Our findings have general implications for the understanding of photosynthetic charge separation mechanisms, and how they might be tuned to achieve different functional goals.

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