RESUMO
The redox properties of the µ-η2:η2 peroxo complex [Cu2(H6M4h)(O2)]2+ were elucidated. This study constitutes the first full electrochemical and spectroelectrochemical characterization of a side-on peroxo Cu2:O2 bioinorganic model complex. The peroxo complex is irreversibly reduced in a two-electron process localized on the peroxo ligand triggering the cleavage of the O-O bond.
Assuntos
Materiais Biomiméticos/química , Complexos de Coordenação/química , Cobre/química , Hemocianinas/química , Oxigênio/química , Técnicas Eletroquímicas/métodos , Elétrons , Estrutura Molecular , Oxirredução , TermodinâmicaRESUMO
The first metal complex based on the calix[6]PN3 cryptand is described. The solid-state and solution studies show a 5-coordinate Cu(II) center due to its coordination to the PN3 cap and to an exchangeable guest molecule. Spectroscopic and electrochemical studies evidence surprising properties of the metal ion, which are tentatively assigned to the unusual P-Cu(II) bond enforced by the cryptand.
