scholarly journals Intramolecular ring-to-ring proton transfer in gaseous (.omega.-phenylalkyl)benzenium ions

1979 ◽  
Vol 101 (24) ◽  
pp. 7154-7157 ◽  
Author(s):  
Dietmar Kuck ◽  
Wolfgang Baether ◽  
Hans Friedrich Gruetzmacher
Keyword(s):  
Proton Transfer ◽  
Ring Proton ◽  
Intramolecular Ring

Chemical pathways for poly-anionic isomerisation in the metastable anions of tetra-deprotonated naphthalene: an intra-molecular inter-ring proton-transfer

2017 ◽  
Vol 19 (18) ◽  
pp. 11571-11580 ◽  
Author(s):  
Vikas Vikas ◽  
Poonam Sangwan ◽  
Ramanpreet Kaur
Keyword(s):  
Proton Transfer ◽  
Aromatic Rings ◽  
Ring Proton ◽  
Computational Work ◽  
Anionic Species

An intra-molecular proton-transfer between the two different aromatic rings of naphthalene in the metastable isomeric tetra-anionic species of naphthalene is revealed by this computational work.

An NADH-Inspired Redox Mediator Strategy to Promote Second-Sphere Electron and Proton Transfer for Cooperative Electrochemical CO2 Reduction Catalyzed by Iron Porphyrin

2020 ◽  
Author(s):  
Peter T. Smith ◽  
Sophia Weng ◽  
Christopher Chang
Keyword(s):  
Proton Transfer ◽  
Co2 Reduction ◽  
Iron Porphyrin ◽  
Redox Mediators ◽  
Reservoir Properties ◽  
Proton Reduction ◽  
Electrochemical Co2 Reduction ◽  
Starting Point ◽  
Rate Improvement ◽  
Molecular Catalysts

We present a bioinspired strategy for enhancing electrochemical carbon dioxide reduction catalysis by cooperative use of base-metal molecular catalysts with intermolecular second-sphere redox mediators that facilitate both electron and proton transfer. Functional synthetic mimics of the biological redox cofactor NADH, which are electrochemically stable and are capable of mediating both electron and proton transfer, can enhance the activity of an iron porphyrin catalyst for electrochemical reduction of CO<sub>2</sub> to CO, achieving a 13-fold rate improvement without altering the intrinsic high selectivity of this catalyst platform for CO<sub>2</sub> versus proton reduction. Evaluation of a systematic series of NADH analogs and redox-inactive control additives with varying proton and electron reservoir properties reveals that both electron and proton transfer contribute to the observed catalytic enhancements. This work establishes that second-sphere dual control of electron and proton inventories is a viable design strategy for developing more effective electrocatalysts for CO<sub>2</sub> reduction, providing a starting point for broader applications of this approach to other multi-electron, multi-proton transformations.

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