Spectroscopic and structural investigations of the ferrous and ferric high-spin state of a "picket-fence" porphyrinato acetato iron complex. A refined model for the P460 center of hydroxylamine oxidoreductase

E. Bill, E. L. Bominaar, X. O. Ding, J. Fischer, A. Gismelseed, H. Nasri, A. X. Trautwein, R. Weiss, H. Winkler

Research output: Contribution to journalArticle

Abstract

Mössbauer investigations were performed in the ferrous and ferric form of the 'picket-fence' porphyrinato acetato iron complex |Fe(CH3CO2) (TPpivP)|1-,0 at temperatures varying from 1.5-200K and in fields of 0-6.2T. The ferrous complex has an unusually large quadrupole splitting, ΔEQ=+4.25mms-1. The quadrupole splitting in the ferric species, ΔEQ=+1.1mms-1, is as normally found in ferric high-spin iron porphyrins. Spin-Hamiltonian analysis of the magnetic spectra yields zero-field parameters D=-0.9mms-1, E/D=0.33 and magnetic hyperfine parameters Ax,y=-17T, Az=-13.3T in the ferrous high-spin (S=2) complex, and D=7.5cm-1, E/D≈0 and Ax,y,z=20T in the ferric high-spin (S=5/2) species.

Original languageEnglish
Pages (from-to)1295-1298
Number of pages4
JournalHyperfine Interactions
Volume71
Issue number1-4
DOIs
Publication statusPublished - Apr 1992

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Electronic, Optical and Magnetic Materials

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