Voltammetric Study of a Cupric Hexacyanoferrate Monolayer Immobilized on Mixed Dodecanethiol-Glutathione Self-Assembled Monolayer Modified Gold Electrode

• Published in: Electroanalysis (New York, N.Y.) Vol. 12; no. 10; pp. 763 - 766
• Main Authors: Wang, Jun, Zeng, Baizhao, Fang, Cheng, Zhou, Xingyao
• Format: Journal Article
• Language: English
• Published: Weinheim VCH Verlagsgesellschaft mbH 01.06.2000
• Subjects: Cupric hexacyanoferrate; Dodecanethiol; Glutathione; Gold electrode; Self-assembled monolayer
• ISSN: 1040-0397; 1521-4109
• DOI: 10.1002/1521-4109(200006)12:10<763::AID-ELAN763>3.0.CO;2-N

Mixed dodecanethiol‐glutathinone self‐assembled monolayers (DDT‐GSH) were prepared on a gold electrode and further derivatized to form a monolayer of cupric hexacyanoferrate (CuHCF). Electrochemical behavior of the modified electrode was investigated by cyclic voltammetry. This inorganic monolayer modified electrode is electroactive and its surface concentration is 4.2×10–10 mol cm–2. It is observed that this modified electrode shows selectivity to potassium ion and exhibits an ideal Nernstian response with a slope of 60 mV/decade to potassium ions in the range from 10–2 to 1.0 mol L–1.