Electronic Structure Description of a [Co(III)3Co(IV)O4] Cluster: A Model for the Paramagnetic Intermediate in Cobalt-Catalyzed Water Oxidation

2011 ◽  
Vol 133 (39) ◽  
pp. 15444-15452 ◽  
Author(s):  
J. Gregory McAlpin ◽  
Troy A. Stich ◽  
C. André Ohlin ◽  
Yogesh Surendranath ◽  
Daniel G. Nocera ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Water Oxidation ◽  
Structure Description ◽  
Cluster A

scholarly journals Electronic Structure of Tyrosyl D Radical of Photosystem II, as Revealed by 2D-Hyperfine Sublevel Correlation Spectroscopy

2021 ◽  
Vol 7 (9) ◽  
pp. 131
Author(s):  
Maria Chrysina ◽  
Georgia Zahariou ◽  
Nikolaos Ioannidis ◽  
Yiannis Sanakis ◽  
George Mitrikas
Keyword(s):  
Electronic Structure ◽  
Photosystem Ii ◽  
Water Oxidation ◽  
Spinacia Oleracea ◽  
Higher Plants ◽  
Correlation Spectroscopy ◽  
Oxygen Evolving Complex ◽  
Higher Plant ◽  
Proton Coupled Electron Transfer ◽  
S Oxidation

The biological water oxidation takes place in Photosystem II (PSII), a multi-subunit protein located in thylakoid membranes of higher plant chloroplasts and cyanobacteria. The catalytic site of PSII is a Mn4Ca cluster and is known as the oxygen evolving complex (OEC) of PSII. Two tyrosine residues D1-Tyr161 (YZ) and D2-Tyr160 (YD) are symmetrically placed in the two core subunits D1 and D2 and participate in proton coupled electron transfer reactions. YZ of PSII is near the OEC and mediates electron coupled proton transfer from Mn4Ca to the photooxidizable chlorophyll species P680+. YD does not directly interact with OEC, but is crucial for modulating the various S oxidation states of the OEC. In PSII from higher plants the environment of YD• radical has been extensively characterized only in spinach (Spinacia oleracea) Mn- depleted non functional PSII membranes. Here, we present a 2D-HYSCORE investigation in functional PSII of spinach to determine the electronic structure of YD• radical. The hyperfine couplings of the protons that interact with the YD• radical are determined and the relevant assignment is provided. A discussion on the similarities and differences between the present results and the results from studies performed in non functional PSII membranes from higher plants and PSII preparations from other organisms is given.

Optical and electronic structure description of metal-doped phthalocyanines

2017 ◽  
Vol 23 (5) ◽  
Author(s):  
Luciano Almeida Leal ◽  
Wiliam Ferreira da Cunha ◽  
Luiz Antonio Ribeiro Junior ◽  
Tamires Lima Pereira ◽  
Stefan Michael Blawid ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Structure Description ◽  
Metal Doped

scholarly journals Electronic Structure Description of a Doubly Oxidized Bimetallic Cobalt Complex with Proradical Ligands

2015 ◽  
Vol 55 (2) ◽  
pp. 762-774 ◽  
Author(s):  
Ryan M. Clarke ◽  
Khatera Hazin ◽  
John R. Thompson ◽  
Didier Savard ◽  
Kathleen E. Prosser ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Cobalt Complex ◽  
Structure Description

Tuning Surface Electronic Structure of Two‐Dimensional Cobalt‐Based Hydroxide Nanosheets for Highly Efficient Water Oxidation

ChemCatChem ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2823-2832 ◽  
Author(s):  
Chen Qiao ◽  
Souleymen Rafai ◽  
Tai Cao ◽  
Zhitao Wang ◽  
Haoyu Wang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Water Oxidation ◽  
Two Dimensional ◽  
Highly Efficient ◽  
Surface Electronic Structure

Selenium vacancy triggered atomic disordering of Co0.85Se nanoparticles towards a highly-active electrocatalyst for water oxidation

2020 ◽  
Vol 56 (92) ◽  
pp. 14451-14454
Author(s):  
Jiahao Zhang ◽  
Qiucheng Xu ◽  
Yanjie Hu ◽  
Hao Jiang ◽  
Chunzhong Li
Keyword(s):  
Electronic Structure ◽  
Water Oxidation ◽  
Highly Active

A moderate VSe degree can optimize the atomic disordering and electronic structure of Co-centers, remarkably enhancing the alkaline OER performance of Co0.85Se.

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