ABSTRACT
The phthalocyanines [1, 2, 4, 32, 34, 60] are an important class of synthetic dyestuffs which became of great commercial significance in the early part of last century and continue to be extensively applied because of their intense color, high thermal and chemical stability and non-toxicity. Another very critical feature of these species is their redox activity, their ability to exist in a wide range of different oxidation states involving oxidation or reduction of the metal and/ or phthalocyanine ring [4]. This combination of properties has spawned new applications and potential applications including CD-W disk dyes (information storage), photodynamic therapy, odor removal, removal of sulfur from oils, security applications, molecular metals, fuel cell catalysts, CHEMFET devices and chemical sensors [4, 29, 39, 60].
