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Electrochemical Characterization of the Self‐assembled Monolayer of 6‐Thioguanine on the Mercury Electrode
Author(s) -
Arias Zoraida González,
Muñiz Álvarez Jesús Luis,
López Fonseca Juan Miguel
Publication year - 2004
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302912
Subject(s) - monolayer , hanging mercury drop electrode , electrode , mercury (programming language) , electrochemistry , chemistry , cyclic voltammetry , self assembled monolayer , drop (telecommunication) , dropping mercury electrode , in situ , analytical chemistry (journal) , inorganic chemistry , voltammetry , organic chemistry , telecommunications , biochemistry , computer science , programming language
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.