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