Stabilization of higher-valent states of iron porphyrin by hydroxide and methoxide ligands: electrochemical generation of iron(IV)-oxo porphyrins.

AUTOR(ES)

Lee, W A

RESUMO

An electrochemical study of hydroxide- and methoxide-ligated iron(III) tetraphenylporphyrins possessing ortho-phenyl substituents that block mu-oxo dimer formation has been carried out. Ligation by these strongly basic oxyanions promotes the formation of iron(IV)-oxo porphyrins upon one-electron oxidation. Further one-electron oxidation of the latter provides the iron(IV)-oxo porphyrin pi-cation radical. These results are discussed in terms of chemical model studies and the enzymatic intermediate compounds I and II of the peroxidases.

Documentos Relacionados

• The effect of iron displacement out of the porphyrin plane on the resonance Raman spectra of heme proteins and iron porphyrins.
• Carbon monoxide binding to iron porphyrins.
• Cooperativity in O2 binding to iron porphyrins.
• CONCERNING THE NATURALLY OCCURRING PORPHYRINS. IV. THE URINARY PORPHYRIN IN LEAD POISONING AS CONTRASTED WITH THAT EXCRETED NORMALLY AND IN OTHER DISEASES 1
• DNA intercalation and photosensitization by cationic meso substituted porphyrins.