A poly(pyrrole-copper(II) deuteroporphyrin) modified electrode

A new copper deuteroporphyrin functionalized by two pyrrole groups has been synthesized. This complex was isolated and characterized by H-1 NMR, UV-vi sible spectroscopy, mass spectrometry and electrochemistry. This functional ization has allowed the preparation of the first example of metallodeuterop orphyrin film by oxidative electropolymerization. The redox properties of t he resulting modified electrode have been investigated by cyclic voltammetr y. The voltammograms display the regular electroactivity of copper deuterop orphyrin as well as that related to the polypyrrole skeleton. Owing to its cross-linked structure this polymeric film exhibits a relatively good elect rochemical stability. In addition, it appears that the electropolymerizatio n yield is markedly better than those previously reported for pyrrole-subst ituted copper tetraphenylporphyrin. Preliminary experiments have demonstrat ed the possibility to use this kind of electrode material in aqueous media. (C) 1998 John Wiley & Sons, Ltd.