Journal
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
Volume 6, Issue 2, Pages 98-106Publisher
WORLD SCI PUBL CO INC
DOI: 10.1142/S1088424602000130
Keywords
cyclic voltammetry; self-assembled monolayer; thiol-derivatized phthalocyanines; cobalt phthalocyanines
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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. Copyright (C) 2002 Society of Porphyrins & Phthalocyanines.
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