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Electrochemical Characterization of the Self‐assembled Monolayer of 6‐Thioguanine on the Mercury Electrode

Zoraida González Arias, Jesús Luis Muñiz Álvarez, Juan Miguel López Fonseca

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Abstract

Abstract A self‐assembled monolayer (SAM) of 6‐thioguanine (6TG) was formed on the hanging mercury drop electrode, under open circuit potential, from 6TG solutions. The SAM has been characterized by cyclic voltammetry under both in situ and ex situ conditions and the experimental data reveal that the film is a densely packed structure of chemisorbed (mercury‐thiol) molecules. The presence of this SAM has no influence on the rate of outer‐sphere electrode reactions but strongly inhibits inner‐sphere processes. The electrode reaction involving the Fe(CN)$\rm{ {_{6}^{3-/4-}}}$ couple appears reversible in a hanging mercury drop electrode coated by the 6TG‐SAM.

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What this paper is about

Abstract A self‐assembled monolayer (SAM) of 6‐thioguanine (6TG) was formed on the hanging mercury drop electrode, under open circuit potential, from 6TG solutions. The SAM has been characterized by cyclic voltammetry under both in situ and ex situ conditions and the experimental data reveal that the film is a densely packed structure of chemisorbed (mercury‐thiol) molecules. The presence of this SAM has no influence on the rate of outer‐sphere electrode reactions but strongly inhibits inner‐sphere processes. The electrode reaction involving the Fe(CN)$\rm{ {_{6}^{3-/4-}}}$ couple appears reversible in a hanging mercury drop electrode coated by the 6TG‐SAM.

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Available abstract

Abstract A self‐assembled monolayer (SAM) of 6‐thioguanine (6TG) was formed on the hanging mercury drop electrode, under open circuit potential, from 6TG solutions. The SAM has been characterized by cyclic voltammetry under both in situ and ex situ conditions and the experimental data reveal that the film is a densely packed structure of chemisorbed (mercury‐thiol) molecules. The presence of this SAM has no influence on the rate of outer‐sphere electrode reactions but strongly inhibits inner‐sphere processes. The electrode reaction involving the Fe(CN)$\rm{ {_{6}^{3-/4-}}}$ couple appears reversible in a hanging mercury drop electrode coated by the 6TG‐SAM.

Key concepts: Monolayer, Hanging mercury drop electrode, Electrode, Mercury (programming language), Electrochemistry, Chemistry, Cyclic voltammetry, Self-assembled monolayer

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Electrochemical Characterization of the Self‐assembled Monolayer of 6‐Thioguanine on the Mercury Electrode — Research Paper | ScholarLens