Interaction of dioxygen with binuclear nitride-bridged iron porphyrins

David F. Bocian, Eric W. Findsen, Joseph A. Hofmann, G. Alan Schick, Daniel R. English, David N. Hendrickson, Kenneth S. Suslick

Research output: Contribution to journalArticlepeer-review


An unusual interaction between O2 and nitride-bridged iron porphyrin dimers in frozen polar glasses has been found. The EPR spectrum previously attributed to a pyridine monoadduct of (μ-nitrido)bis[(5, 10, 15, 20-tetraphenylporphinato)iron] is in fact due to an O2 adduct of the dimeric porphyrin. Optical spectroscopy shows that the O2/porphyrin interaction is weak. Mossbauer spectra demonstrate that the two iron ions are inequivalent in the adduct while EPR data indicate a less anisotropic g tensor and appreciably diminished 14N and 57Fe hyperfme coupling relative to the nonadducted species. O2 titrations, as monitored by EPR, show that the adduct's stoichiometry is one 2 per dimer. All these data are consistent with a weak axial interaction of O2 with one side of the μ-nitrido dimer.

Original languageEnglish (US)
Pages (from-to)800-807
Number of pages8
JournalInorganic Chemistry
Issue number7
StatePublished - Aug 1984

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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