Multiantenna Artificial Photosynthetic Reaction Center Complex

2009 ◽  
Vol 113 (20) ◽  
pp. 7147-7155 ◽  
Author(s):  
Yuichi Terazono ◽  
Gerdenis Kodis ◽  
Paul A. Liddell ◽  
Vikas Garg ◽  
Thomas A. Moore ◽  
...  
Keyword(s):  
Reaction Center ◽  
Photosynthetic Reaction Center ◽  
Reaction Center Complex ◽  
Artificial Photosynthetic

scholarly journals HYSCORE and DFT Studies of Proton-Coupled Electron Transfer in a Bioinspired Artificial Photosynthetic Reaction Center

iScience ◽  
2020 ◽  
Vol 23 (8) ◽  
pp. 101366
Author(s):  
Dalvin D. Méndez-Hernández ◽  
Amgalanbaatar Baldansuren ◽  
Vidmantas Kalendra ◽  
Philip Charles ◽  
Brian Mark ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Reaction Center ◽  
Photosynthetic Reaction Center ◽  
Dft Studies ◽  
Proton Coupled Electron Transfer ◽  
Artificial Photosynthetic

Charge Separation in a Novel Artificial Photosynthetic Reaction Center Lives 380 ms

2001 ◽  
Vol 123 (27) ◽  
pp. 6617-6628 ◽  
Author(s):  
Hiroshi Imahori ◽  
Dirk M. Guldi ◽  
Koichi Tamaki ◽  
Yutaka Yoshida ◽  
Chuping Luo ◽  
...  
Keyword(s):  
Reaction Center ◽  
Charge Separation ◽  
Photosynthetic Reaction Center ◽  
Artificial Photosynthetic

scholarly journals HYSCORE and DFT Studies of Proton-Coupled Electron Transfer in a Bioinspired Artificial Photosynthetic Reaction Center

2020 ◽  
Author(s):  
Dalvin D Méndez-Hernández ◽  
Amgalanbaatar Baldansuren ◽  
Vidmantas Kalendra ◽  
Philip Charles ◽  
Brian Mark ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electronic Structure ◽  
Reaction Center ◽  
Water Oxidation ◽  
Density Functional ◽  
Photosynthetic Reaction Center ◽  
Strong Hydrogen Bond ◽  
Water Molecules ◽  
Proton Coupled Electron Transfer ◽  
Artificial Photosynthetic

<p>Light-driven water oxidation in algae, cyanobacteria, and higher plants generates dioxygen that supports life on Earth. The water-oxidation reaction is catalyzed by the oxygen-evolving complex (OEC) in photosystem II (PSII) that is comprised of the tetranuclear manganese calcium-oxo (Mn<sub>4</sub>CaO<sub>5</sub>) cluster, with participation of the redox-active tyrosine residue (Y<sub>Z</sub>) and a hydrogen-bonded network of amino acids and water molecules. Y<sub>Z</sub> mediates successive proton-coupled electron transfer (PCET) reactions that are essential for the oxidation of water to dioxygen at the Mn<sub>4</sub>CaO<sub>5</sub> cluster. It has been proposed that the strong hydrogen bond between Y<sub>Z</sub> and and its conjugate base, D1-His190, likely renders Y<sub>Z</sub> kinetically and thermodynamically competent leading to highly efficient water oxidation.<sup>1</sup> However, a detailed understanding of PCET at Y<sub>Z</sub> remains elusive due to the transient nature of its intermediate states. In this study, we utilize a combination of high-resolution two-dimensional (2D) <sup>14</sup>N hyperfine sublevel correlation (HYSCORE) spectroscopy and density functional theory (DFT) methods to investigate the electronic structure of a bioinspired artificial photosynthetic reaction center, benzimidazole-phenol porphyrin (BiP–PF<sub>10</sub>), that mimics the PCET process at the Y<sub>Z</sub> residue of PSII. The results of these studies underscore the importance of proximal water molecules and charge delocalization on the electronic structure of the artificial reaction center.</p>

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