OXOFERRYL PORPHYRIN CATION RADICALS IN MODEL SYSTEMS - EVIDENCE FOR VARIABLE METAL-RADICAL SPIN COUPLING

被引:3
作者
BILL, E
BOMINAAR, EL
DING, XQ
TRAUTWEIN, AX
WINKLER, H
MANDON, D
WEISS, R
GOLD, A
JAYARAJ, K
TONEY, GE
机构
[1] UNIV STRASBOURG 1,INST LE BEL,F-67070 STRASBOURG,FRANCE
[2] UNIV N CAROLINA,DEPT ENVIRONM SCI & ENGN,CHAPEL HILL,NC 27599
来源
HYPERFINE INTERACTIONS | 1990年 / 58卷 / 1-4期
关键词
D O I
10.1007/BF02398341
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
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. © 1990 J.C. Baltzer A.G. Scientific Publishing Company.
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页码:2343 / 2348
页数:6
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