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The Effect of Adsorption of Ions of the Hexacyanoferrate(II)/(III) Redox Pair on Self-Assembly of Octanethiol at Its Adsorption from Aqueous Solutions on Gold Electrode.
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- Author(s): Ovchinnikova, S. N.
- Source:
Russian Journal of Electrochemistry; Nov2017, Vol. 53 Issue 11, p1246-1253, 8p- Subject Terms:
- Source:
- Additional Information
- Abstract: The effect of components of the redox pair K
3 [Fe(CN)6 ]/K4 [Fe(CN)6 ] on the dynamics of formation of octanethiol (OT) monolayers from aqueous thiol-containing solutions of 0.1 М NaClO4 is studied by cyclic voltammetry (CVA). The formation of OT monolayers is shown to depend on the presence of ions of hexacyanoferrate(II)/(III) in solution. Being added to solution, the components of the [Fe(CN)6 ]3–/4– redox pair sharply increase the time of formation of the insulating monolayer OT films and make them less stable. The destabilizing and inhibiting action of [Fe(CN)6 ]3–/4– ions becomes stronger as their concentration in solution increases. The adsorption activity of individual components of the redox pair is assessed. The strong and approximately equal adsorption activity of ions [Fe(CN)6 ]3– and [Fe(CN)6 ]4– on gold in the presence of octanethiol is observed. At the same time, OT and the hexacyanoferrate(II)/(III) ions can be placed in the following row: OT > [Fe(CN)6]3– ≈ [Fe(CN)6 ]4–. Recommendations are given on how to eliminate the interfering action of the K3 [Fe(CN)6 ]/K4 [Fe(CN)6 ] redox-pair ions when studying the insulating properties of thiol monolayers on gold. [ABSTRACT FROM AUTHOR] - Abstract: Copyright of Russian Journal of Electrochemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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