Cyclic Voltammetric and Scanning Electrochemical Microscopic Study of Menadione Permeability through a Self-Assembled Monolayer on a Gold Electrode

Langmuir ◽  
2002 ◽  
Vol 18 (21) ◽  
pp. 8134-8141 ◽  
Author(s):  
Céline Cannes ◽  
Frédéric Kanoufi ◽  
Allen J. Bard
2002 ◽  
Vol 06 (02) ◽  
pp. 98-106 ◽  
Author(s):  
Kenneth Ozoemena ◽  
Philippe Westbroek ◽  
Tebello Nyokong

The synthesis of thiol-derivatized cobalt phthalocyanine complex, 2,3,9,10,16,17,23,24-octa (butylthiophthalocyaninatocobalt(II) ( CoOBTPc ) is described. Cyclic voltammetric data of this complex in DMF showed five quasi-reversible and reversible, diffusion-controlled redox couples, comprising both the phthalocyanine ring and central metal redox processes. The CoOBTPc complex forms a self-assembled monolayer (SAM) on gold electrode. The investigation of the integrity of this SAM, using the established cyclic voltammetric methods in aqueous alkaline solutions, gave evidence about the formation of a stable and easily reproducible monolayer. However, due to its susceptibility to destruction via oxidative and reductive desorptions, its potential application as an electrochemical sensor in alkaline pH is limited to a potential window of between −0.20 and +0.55 V vs Ag / AgCl .


2010 ◽  
Vol 169 (3-4) ◽  
pp. 345-351 ◽  
Author(s):  
Lúcia Codognoto ◽  
Eduardo Winter ◽  
Keity Margareth Doretto ◽  
Gabriel Bezzan Monteiro ◽  
Susanne Rath

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