Oxoferryl porphyrin cation radicals in model systems: Evidence for variable metal-radical spin coupling

E. Bill; E. L. Bominaar; X. Q. Ding; A. X. Trautwein; H. Winkler; D. Mandon; R. Weiss; A. Gold; K. Jayaraj; G. E. Toney

doi:10.1007/BF02398341

Oxoferryl porphyrin cation radicals in model systems: Evidence for variable metal-radical spin coupling

E. Bill^*, E. L. Bominaar, X. Q. Ding, A. X. Trautwein, H. Winkler, D. Mandon, R. Weiss, A. Gold, K. Jayaraj, G. E. Toney

^*Corresponding author for this work

Institute of Physics

2 Citations (Scopus)

Abstract

Magnetic properties of frozen solutions of highly oxidized iron porphyrin complexes were investigated by EPR and Mössbauer spectroscopy. The Mössbauer spectra, recorded at low temperatures in various magnetic fields, were analyzed on the basis of spin Hamiltonian simulations. Spin coupling between ferryl iron (Fe^IV) and porphyrin cation radical was taken into account explicitly. Hyperfine and spin-coupling parameters are given for several complexes, together with zero-field parameters. One of the complexes exhibits weak spin coupling, it is the first model system exhibiting properties comparable to those of the oxoferryl cation radical enzyme Horse Radish Peroxidase I.

Original language	English
Journal	Hyperfine Interactions
Volume	58
Issue number	1-4
Pages (from-to)	2343-2348
Number of pages	6
ISSN	0304-3843
DOIs	https://doi.org/10.1007/BF02398341
Publication status	Published - 01.07.1990

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@article{f0d02aabb7ca4961bde2b68e83cc5c96,

title = "Oxoferryl porphyrin cation radicals in model systems: Evidence for variable metal-radical spin coupling",

abstract = "Magnetic properties of frozen solutions of highly oxidized iron porphyrin complexes were investigated by EPR and M{\"o}ssbauer spectroscopy. The M{\"o}ssbauer spectra, recorded at low temperatures in various magnetic fields, were analyzed on the basis of spin Hamiltonian simulations. Spin coupling between ferryl iron (FeIV) and porphyrin cation radical was taken into account explicitly. Hyperfine and spin-coupling parameters are given for several complexes, together with zero-field parameters. One of the complexes exhibits weak spin coupling, it is the first model system exhibiting properties comparable to those of the oxoferryl cation radical enzyme Horse Radish Peroxidase I.",

author = "E. Bill and Bominaar, {E. L.} and Ding, {X. Q.} and Trautwein, {A. X.} and H. Winkler and D. Mandon and R. Weiss and A. Gold and K. Jayaraj and Toney, {G. E.}",

year = "1990",

month = jul,

day = "1",

doi = "10.1007/BF02398341",

language = "English",

volume = "58",

pages = "2343--2348",

journal = "Hyperfine Interactions",

issn = "0304-3843",

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TY - JOUR

T1 - Oxoferryl porphyrin cation radicals in model systems: Evidence for variable metal-radical spin coupling

AU - Bill, E.

AU - Bominaar, E. L.

AU - Ding, X. Q.

AU - Trautwein, A. X.

AU - Winkler, H.

AU - Mandon, D.

AU - Weiss, R.

AU - Gold, A.

AU - Jayaraj, K.

AU - Toney, G. E.

PY - 1990/7/1

Y1 - 1990/7/1

N2 - Magnetic properties of frozen solutions of highly oxidized iron porphyrin complexes were investigated by EPR and Mössbauer spectroscopy. The Mössbauer spectra, recorded at low temperatures in various magnetic fields, were analyzed on the basis of spin Hamiltonian simulations. Spin coupling between ferryl iron (FeIV) and porphyrin cation radical was taken into account explicitly. Hyperfine and spin-coupling parameters are given for several complexes, together with zero-field parameters. One of the complexes exhibits weak spin coupling, it is the first model system exhibiting properties comparable to those of the oxoferryl cation radical enzyme Horse Radish Peroxidase I.

AB - Magnetic properties of frozen solutions of highly oxidized iron porphyrin complexes were investigated by EPR and Mössbauer spectroscopy. The Mössbauer spectra, recorded at low temperatures in various magnetic fields, were analyzed on the basis of spin Hamiltonian simulations. Spin coupling between ferryl iron (FeIV) and porphyrin cation radical was taken into account explicitly. Hyperfine and spin-coupling parameters are given for several complexes, together with zero-field parameters. One of the complexes exhibits weak spin coupling, it is the first model system exhibiting properties comparable to those of the oxoferryl cation radical enzyme Horse Radish Peroxidase I.

UR - http://www.scopus.com/inward/record.url?scp=2742535368&partnerID=8YFLogxK

U2 - 10.1007/BF02398341

DO - 10.1007/BF02398341

M3 - Journal articles

AN - SCOPUS:2742535368

SN - 0304-3843

VL - 58

SP - 2343

EP - 2348

JO - Hyperfine Interactions

JF - Hyperfine Interactions

IS - 1-4

ER -

Oxoferryl porphyrin cation radicals in model systems: Evidence for variable metal-radical spin coupling

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