A mononuclear ruthenium complex showing multiple proton-coupled electron transfer toward multi-electron transfer reactions

2012 ◽  
Vol 41 (42) ◽  
pp. 13081 ◽  
Author(s):  
Masaya Okamura ◽  
Masaki Yoshida ◽  
Reiko Kuga ◽  
Ken Sakai ◽  
Mio Kondo ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Ruthenium Complex ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Proton Coupled Electron Transfer

scholarly journals Anomalous chemically induced electron spin polarization in proton-coupled electron transfer reactions: insight into radical pair dynamics

2020 ◽  
Vol 11 (24) ◽  
pp. 6268-6274
Author(s):  
Alexander M. Brugh ◽  
Malcolm D. E. Forbes
Keyword(s):  
Electron Transfer ◽  
Ruthenium Complex ◽  
Transfer Reactions ◽  
Electron Spin Polarization ◽  
Paramagnetic Resonance ◽  
Time Resolved ◽  
Proton Coupled Electron Transfer ◽  
Chemically Induced ◽  
Electron Paramagnetic ◽  
Insight Into

Time-resolved electron paramagnetic resonance (TREPR) spectroscopy has been used to study the proton coupled electron transfer (PCET) reaction between a Ruthenium complex (Ru(bpz)(bpy)2) and several substituted hydroquinones (HQ).

Effect of Pressure on Proton-Coupled Electron Transfer Reactions of Seven-Coordinate Iron Complexes in Aqueous Solutions

2005 ◽  
Vol 44 (21) ◽  
pp. 7624-7633 ◽  
Author(s):  
David Sarauli ◽  
Roland Meier ◽  
Gao-Feng Liu ◽  
Ivana Ivanović-Burmazović ◽  
Rudi van Eldik
Keyword(s):  
Electron Transfer ◽  
Aqueous Solutions ◽  
Iron Complexes ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Effect Of Pressure ◽  
Proton Coupled Electron Transfer

scholarly journals Concerted proton-electron transfer reactions in the Marcus inverted region

Science ◽  
2019 ◽  
Vol 364 (6439) ◽  
pp. 471-475 ◽  
Author(s):  
Giovanny A. Parada ◽  
Zachary K. Goldsmith ◽  
Scott Kolmar ◽  
Belinda Pettersson Rimgard ◽  
Brandon Q. Mercado ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Rate Constants ◽  
Charge Recombination ◽  
Transfer Reactions ◽  
Inverted Region ◽  
Electron Transfer Reactions ◽  
Proton Coupled Electron Transfer ◽  
Marcus Inverted Region ◽  
A Charge ◽  
Theory Yield

Electron transfer reactions slow down when they become very thermodynamically favorable, a counterintuitive interplay of kinetics and thermodynamics termed the inverted region in Marcus theory. Here we report inverted region behavior for proton-coupled electron transfer (PCET). Photochemical studies of anthracene-phenol-pyridine triads give rate constants for PCET charge recombination that are slower for the more thermodynamically favorable reactions. Photoexcitation forms an anthracene excited state that undergoes PCET to create a charge-separated state. The rate constants for return charge recombination show an inverted dependence on the driving force upon changing pyridine substituents and the solvent. Calculations using vibronically nonadiabatic PCET theory yield rate constants for simultaneous tunneling of the electron and proton that account for the results.

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