ChemInform Abstract The synthetic dicopper(I) oxygen carrier (I), prepared by a literature method, serves as an active-site model of hemocyanin. Its surface-enhanced Raman scattering spectra (SERS) and cyclic voltammograms are obtained. Its reaction with oxygen in absolute EtOH gives a solid with the formula (II). Oxyhemocyanin from Taiwan snails contains peroxo dioxygen (SERS evidence). Cyclic voltammetric studies of (II) indicate the existence of Cu(II)-O2-Cu(II) in the initial stages of oxygenation. The CO adducts of (I) and hemocyanin are also studied. The affinity and effect of CO binding to the model and the protein are smaller than those of O2 binding.
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