Abstract
Specimens of iron phthalocyanines (polymer and monomer) were examined by optical and Mössbauer spectroscopy to identify the oxidation state, type of coordination, and spin configuration of the iron. Electrochemical measurements for oxygen reduction in alkaline solution carried out by the ultrathin electrode technique on suitably supported preparations showed that greatest activity occurred for fivefold coordinated Fe III in the intermediate-spin state. The reaction mechanism was determined.
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