Voltammetric applications of hydrogen bonding and proton-coupled electron transfer reactions of organic molecules

2019 ◽  
Vol 15 ◽  
pp. 27-33 ◽  
Author(s):  
Malcolm E. Tessensohn ◽  
Richard D. Webster
Keyword(s):  
Electron Transfer ◽  
Hydrogen Bonding ◽  
Organic Molecules ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Proton Coupled Electron Transfer

Significance of hydrogen bonding networks in the proton-coupled electron transfer reactions of photosystem II from a quantum-mechanics perspective

2019 ◽  
Vol 21 (17) ◽  
pp. 8721-8728 ◽  
Author(s):  
Jun Chai ◽  
Zhaoyang Zheng ◽  
Hui Pan ◽  
Shengbai Zhang ◽  
K. V. Lakshmi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hydrogen Bonding ◽  
Quantum Mechanics ◽  
Photosystem Ii ◽  
Transfer Reactions ◽  
Quantum Mechanical ◽  
Quantum Mechanical Calculations ◽  
Electron Transfer Reactions ◽  
Proton Coupled Electron Transfer ◽  
Hydrogen Bonding Networks

All quantum-mechanical calculations provide insights into the effect of the hydrogen bonding network on the proton-coupled electron transfer at YZ and YD in photosystem II.

scholarly journals Correction: Significance of hydrogen bonding networks in the proton-coupled electron transfer reactions of photosystem II from a quantum-mechanics perspective

2019 ◽  
Vol 21 (39) ◽  
pp. 22160-22160
Author(s):  
Jun Chai ◽  
Zhaoyang Zheng ◽  
Hui Pan ◽  
Shengbai Zhang ◽  
K. V. Lakshmi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hydrogen Bonding ◽  
Quantum Mechanics ◽  
Photosystem Ii ◽  
Chem Phys ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Proton Coupled Electron Transfer ◽  
Hydrogen Bonding Networks ◽  
Phys Chem Chem Phys

Correction for ‘Significance of hydrogen bonding networks in the proton-coupled electron transfer reactions of photosystem II from a quantum-mechanics perspective’ by Jun Chai et al., Phys. Chem. Chem. Phys., 2019, 21, 8721–8728.

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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