Voltammetric Measurement of Interfacial Acid/Base Reactions

The voltammetric response of a Ag(111) electrode coated with a mixed molecular film of 11-mercaptoundecanoic acid and 1-decanethiol is presented. The voltammetric current arises from the reversible, electric field-driven deprotonation of carboxylic acid groups. Voltammetric peak heights for interfac...

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Bibliographic Details
Published in:The journal of physical chemistry. B 1998-04, Vol.102 (16), p.2930-2934
Main Authors: White, Henry S, Peterson, Jeffery D, Cui, Qizhi, Stevenson, Keith J
Format: Article
Language:English
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Summary:The voltammetric response of a Ag(111) electrode coated with a mixed molecular film of 11-mercaptoundecanoic acid and 1-decanethiol is presented. The voltammetric current arises from the reversible, electric field-driven deprotonation of carboxylic acid groups. Voltammetric peak heights for interfacial protonation and deprotonation are a function of solution pH, obtaining maximum values near the pK 1/2 (∼8.5) of the molecular film.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp980035+