Oxy-hemocyanin: A Peroxo Copper(II) Complex? A Mixed-Valence Alternative View

Abstract In the last few years we have been studying different mixed-valence copper complexes to analyze their potentiality as bioinorganic models. In this paper the most relevant spectroscopic results obtained with our model complexes are described. Contrasting these results with the information published in literature for oxy-hemocyanin, a new model is suggested for it. Specifically it is proposed that a mixed-valence superoxo species could also be related to the hemocyanin-oxygen activation process, possibly existing in equilibrium with the peroxo species, proven to exist in oxy-hemocyanin.

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