Unveiling mechanistic implications of water ‎oxidation reaction boosted by guanidine proton relay: a chemical-electrochemical-chemical pathway and a non-‎concerted proton-electron transfer

2021 ◽  
Author(s):  
Mojtaba Shamsipur ◽  
Moslem - Ardeshiri ◽  
Avat Taherpour ◽  
Afshin Pashabadi
Keyword(s):  
Electron Transfer ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
Proton Coupled Electron Transfer ◽  
Proton Relay ◽  
Artificial Water

Concerted or non-concerted; these are two competitive pathways that involve in proton-coupled ‎electron transfer-driven artificial water oxidation reaction (WOR). It is known that in the designed metal-based ‎electrocatalysts applied to...

A biomimetic phenol substituent effect on the reaction of a dimethylplatinum(ii) complex with oxygen: proton coupled electron transfer and multiple proton relay

2015 ◽  
Vol 51 (51) ◽  
pp. 10334-10336 ◽  
Author(s):  
Mohamed E. Moustafa ◽  
Paul D. Boyle ◽  
Richard J. Puddephatt
Keyword(s):  
Electron Transfer ◽  
Substituent Effect ◽  
Dramatic Effect ◽  
Proton Coupled Electron Transfer ◽  
Proton Relay

A phenol substituent has a dramatic effect on the oxidation of a dimethylplatinum(ii) complex with O2.

The role of proton coupled electron transfer in water oxidation

2012 ◽  
Vol 5 (7) ◽  
pp. 7704 ◽  
Author(s):  
Christopher J. Gagliardi ◽  
Aaron K. Vannucci ◽  
Javier J. Concepcion ◽  
Zuofeng Chen ◽  
Thomas J. Meyer
Keyword(s):  
Electron Transfer ◽  
Water Oxidation ◽  
Proton Coupled Electron Transfer

scholarly journals Atomically manipulated proton transfer energizes water oxidation on silicon carbide photoanodes

2018 ◽  
Vol 6 (47) ◽  
pp. 24358-24366 ◽  
Author(s):  
Hao Li ◽  
Huan Shang ◽  
Yuchen Shi ◽  
Rositsa Yakimova ◽  
Mikael Syväjärvi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Electron Transfer ◽  
Proton Transfer ◽  
Water Oxidation ◽  
Proton Coupled Electron Transfer ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Rate Limiting

Preferential exposure of Si-face of SiC will mechanistically shift the rate limiting step of water oxidation from sluggish proton-coupled electron transfer on C-face to a more energy-favorable electron transfer.

Aligning Electronic and Protonic Energy Levels of Proton-Coupled Electron Transfer in Water Oxidation on Aqueous TiO2

2014 ◽  
Vol 126 (45) ◽  
pp. 12242-12246 ◽  
Author(s):  
Jun Cheng ◽  
Xiandong Liu ◽  
John A. Kattirtzi ◽  
Joost VandeVondele ◽  
Michiel Sprik
Keyword(s):  
Electron Transfer ◽  
Water Oxidation ◽  
Energy Levels ◽  
Proton Coupled Electron Transfer

scholarly journals Frontispiece: Aligning Electronic and Protonic Energy Levels of Proton-Coupled Electron Transfer in Water Oxidation on Aqueous TiO2

2014 ◽  
Vol 53 (45) ◽  
pp. n/a-n/a
Author(s):  
Jun Cheng ◽  
Xiandong Liu ◽  
John A. Kattirtzi ◽  
Joost VandeVondele ◽  
Michiel Sprik
Keyword(s):  
Electron Transfer ◽  
Water Oxidation ◽  
Energy Levels ◽  
Proton Coupled Electron Transfer

scholarly journals Design and synthesis of benzimidazole phenol-porphyrin dyads for the study of bioinspired photoinduced proton-coupled electron transfer

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1336-1345
Author(s):  
S. Jimena Mora ◽  
Daniel A. Heredia ◽  
Emmanuel Odella ◽  
Uma Vrudhula ◽  
Devens Gust ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Photosystem Ii ◽  
Proton Transfer ◽  
Water Oxidation ◽  
Oxidation Catalyst ◽  
Design And Synthesis ◽  
Proton Coupled Electron Transfer ◽  
Anchoring Groups ◽  
High Redox Potential

Benzimidazole phenol-porphyrin dyads have been synthesized to study proton-coupled electron transfer (PCET) reactions induced by photoexcitation. High-potential porphyrins have been chosen to model P680, the photoactive chlorophyll cluster of photosynthetic photosystem II (PSII). They have either two or three pentafluorophenyl groups at the meso positions to impart the high redox potential. The benzimidazole phenol (BIP) moiety models the Tyr[Formula: see text]-His190 pair of PSII, which is a redox mediator that shuttles electrons from the water oxidation catalyst to P680[Formula: see text]. The dyads consisting of a porphyrin and an unsubstituted BIP are designed to study one-electron one-proton transfer (E1PT) processes upon excitation of the porphyrin. When the BIP moiety is substituted with proton-accepting groups such as imines, one-electron two-proton transfer (E2PT) processes are expected to take place upon oxidation of the phenol by the excited state of the porphyrin. The bis-pentafluorophenyl porphyrins linked to BIPs provide platforms for introducing a variety of electron-accepting moieties and/or anchoring groups to attach semiconductor nanoparticles to the macrocycle. The triads thus formed will serve to study the PCET process involving the BIPs when the oxidation of the phenol is achieved by the photochemically produced radical cation of the porphyrin.

scholarly journals The mechanism for proton–coupled electron transfer from tyrosine in a model complex and comparisons with Y Z oxidation in photosystem II

2002 ◽  
Vol 357 (1426) ◽  
pp. 1471-1479 ◽  
Author(s):  
Martin Sjödin ◽  
Stenbjörn Styring ◽  
Björn Åkermark ◽  
Licheng Sun ◽  
Leif Hammarström
Keyword(s):  
Electron Transfer ◽  
Photosystem Ii ◽  
Water Oxidation ◽  
Oxidation Mechanism ◽  
Model System ◽  
Proton Coupled Electron Transfer ◽  
Tyrosine Oxidation ◽  
Model Complex ◽  
Primary Donor ◽  
Mn Cluster

In the water–oxidizing reactions of photosystem II (PSII), a tyrosine residue plays a key part as an intermediate electron–transfer reactant between the primary donor chlorophylls (the pigment P 680 ) and the water–oxidizing Mn cluster. The tyrosine is deprotonated upon oxidation, and the coupling between the proton reaction and electron transfer is of great mechanistic importance for the understanding of the water–oxidation mechanism. Within a programme on artificial photosynthesis, we have made and studied the proton–coupled tyrosine oxidation in a model system and been able to draw mechanistic conclusions that we use to interpret the analogous reactions in PSII.

scholarly journals Photoinduced Water Oxidation at the Aqueous GaN (101̅0) Interface: Deprotonation Kinetics of the First Proton-Coupled Electron-Transfer Step

ACS Catalysis ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2317-2323 ◽  
Author(s):  
Mehmed Z. Ertem ◽  
Neerav Kharche ◽  
Victor S. Batista ◽  
Mark S. Hybertsen ◽  
John C. Tully ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Water Oxidation ◽  
Proton Coupled Electron Transfer ◽  
Transfer Step ◽  
Kinetics Of
Sign in / Sign up

Export Citation Format

Share Document