Am. Raitsimring et al., EPR STUDIES OF WEAKLY COUPLED OXOMOLYBDENUM(V) AND LOW-SPIN IRON(III)PORPHYRIN CENTERS, Applied magnetic resonance, 9(2), 1995, pp. 173-192
Citations number
24
Categorie Soggetti
Spectroscopy,"Physics, Atomic, Molecular & Chemical
Novel compounds containing two S=1/2 coupled spin centers (Mo(V) and l
ow spin Fe(III)) have been investigated in detail by X- and Q-band EPR
spectroscopy, spectral simulation and molecular modelling calculation
s. For one system with a Mo-Fe distance of similar to 9.4 Angstrom the
dominant dipolar coupling allows distinction among structures that ar
e consistent with molecular modelling calculations. For the second sys
tem with a Mo-Fe of similar to 7.9 Angstrom the exchange interaction i
s dominant (0.5 < J < 3.0 GHz). These coupled systems are preliminary
benchmarks for using EPR to investigate the Mo-Fe interaction in sulfi
te oxidase.