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Proton-coupled elec...
Proton-coupled electron transfer from an interfacial phenol monolayer
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- Sjödin, Martin, 1974- (author)
- Uppsala universitet,Nanoteknologi och funktionella material,Inst Biol & Technol Saclay, Serv Bioenerget Biol Struct & Mech, Commisariat Energie Atom, Saclay Bat 532, FR-91191 Gif Sur Yvette, France
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- Hjelm, Johan (author)
- Dublin City Univ, FutureNeuro, SFI Res Ctr Chron & Rare Neurol Dis, Sch Chem Sci, Natl Ctr Sensor Res, Dublin 9, Ireland
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- Rutherford, A. William (author)
- Inst Biol & Technol Saclay, Serv Bioenerget Biol Struct & Mech, Commisariat Energie Atom, Saclay Bat 532, FR-91191 Gif Sur Yvette, France
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- Forster, Robert (author)
- Dublin City Univ, FutureNeuro, SFI Res Ctr Chron & Rare Neurol Dis, Sch Chem Sci,Natl Ctr Sensor Res, Dublin 9, Ireland
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(creator_code:org_t)
- Elsevier BV, 2020
- 2020
- English.
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In: Journal of Electroanalytical Chemistry. - : Elsevier BV. - 0022-0728 .- 1873-2569 .- 1572-6657. ; 859
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- A tert-butyl protected phenol is covalently link to a mixed self-assembled monolayer on a gold or platinum electrode. The phenol reduction potential shows the expected pH-dependence of a one-electron, one-proton couple with a decrease in formal reduction potential of 59 ± 5 mV per pH. A titration of the phenol is observed with a pKa of 13.2 and the reduction potential for the phenolate is 0.11 V . NHE. The kinetic behavior of the proton-coupled oxidation deviates substantially from the commonly used models for a step-wise reaction that assume the proton transfer reactions are in equilibrium throughout the reaction. A novel model for step-wise proton-coupled reactions is presented that fully accounts for the pH dependent kinetics and allows the formal rate constants and the transfer coefficients to be determined.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- Phenol-terminated alkane-thiol monolayer
- Proton-coupled electron transfer
- pH dependence
- Kinetic models
Publication and Content Type
- ref (subject category)
- art (subject category)
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