Perchlorinated Phthalocyanines: Spectroscopic Properties and Surface Electrochemistry
Abstract
The electronic spectroscopic data for zinc, cobalt and iron perchlorinated phthalocyanines in several oxidation states are discussed. The magnetic properties of the iron(II) and cobalt(II) derivatives from ambient temperature to 5 K are reported. The electrochemical behavior of these three species is reported in solution and as surfaces on highly oriented pyrolytic graphite. The pH dependence of the surface data is analysed in detail. The first clearly defined reduction process corresponds with M(I)(Cl16Pc(-2))(-)/M(I) (cl16Pc(-3))(2-) for M = Co, Fe. The iron and cobalt species M(II)Pc(-2)/(M(I) pc(-2))(-) redox process are broad or ill-defined on the surface, and absent from solution. The Fe(III)(Cl16Pc(-2))(+)/Fe(II)Cl16Pc(-2) redox process has a typical pH dependence. The data are explained in terms of the acceptor nature of the chlorine substitution. Oxygen reduction data, catalysed by these species, are also reported. Keywords: Electrochemistry surfaces.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1990
- Accession Number
- ADA219047
Entities
People
- Alfred Beverley Philip Lever
- K. Jayaraj
- M.. N. Golovin
- P. Seymour
- Yangyang Fu
Organizations
- University of York