Abstract
AbstractElectroactive self‐assembled monolayers (SAMs) containing viologen group are formed through the adsorption of thiol‐functionalized viologen compound CH3(CH2)9V2+(CH2)8SH, where V2+ is N,N'‐dialkylbipyridinium (i.e. a viologen group), onto gold electrodes form methanol/water solution and its electrochemical behavior is investigated by Ac voltammetry and square wave voltammetry, which have the high sensitivity against background charging. The viologen SAM formed is a sub‐monolayer and the normal potentials corresponding to the two successive oneelectron transfer processes of the active centers (viologen) are ‐360 mV and ‐750 mV (vs. Ag/AgCl) in 0.1 mol/L phosphate buffer solutions (pH 6.96) respectively, and the standard electron transfer rate constant is 9.0 s−1. The electrochemical behavior of this SAM in various solutions has been preliminarily discussed.
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