The phthalocyanines - Molecules of enduring value; a two-dimensional analysis of redox potentials

The sensor applications of MPc derivatives on carbon-type electrodes are br iefly reviewed. The electrochemical properties of metallophthalocyanines in solution and on a surface are reviewed with emphasis on predicting redox p otentials using Hammett substituent constants and using ligand electrochemi cal parameters. Design requirements for a two-electron redox process at a m etallophthalocyanine center are discussed. A two-dimensional approach using both Hammett parameters and ligand electrochemical parameters is introduce d. Some preliminary test examples are presented. Copyright (C) 1999 John Wi ley & Sons, Ltd.