Title

Electrochemical Evidence for the Affinity of N-alkyl Sulfonate Group-modified Viologens to Gold

Abstract

The cyclic voltammograms of n-alkyl sulfonate-group modified viologens on glassy carbon and platinum electrodes are similar to those of dimethyl and di-n-heptyl viologen; on gold electrodes, however, the new species demonstrate a new surface wave whose size depends on the concentration of the n-alkyl sulfonate group-modified viologen in the electrolyte. The saturation coverage is calculated at 7.3 × 10 -10 and at 9.4 × 10 -10 mol cm -2 for N-methyl-N' -(3-sulfonato-n-propyl)-4,4'-bipyridinium iodide (I) and for N-(n-heptyl)-N'-(3-sulfonato-n-propyl)-4,4'-bipyridinium iodide (II), respectively, suggesting formation of a monolayer with the viologen moieties configured normal to the gold electrode surface.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1997 The Electrochemical Society (ECS), All rights reserved.


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