Resonance Raman and electron paramagnetic resonance structural investigations of neutrophil cytochrome b558

Resonance Raman and electron paramagnetic resonance structural investigations of neutrophil cytochrome b558.

The resonance Raman spectra of neutrophil cytochrome b558 obtained upon Soret excitation indicate that the heme is low spin six-coordinate in both ferric and ferrous oxidation states; comparison with the spectra of bis-imidazole hemin suggests imidazole or imidazolate axial ligation. Minor bands attributable to vibrational motions of ring-conjugated vinyl substituents were also observed, consis...

Magnetic Raman optical activity and Raman electron paramagnetic resonance

All molecules in a magnetic field parallel to the incident light beam show a small difference in the intensity of Raman scattering at 900 in right and left circularly polarized incident light. The most interesting effects occur in vibrational resonance Raman scattering from odd—electron transition metal halides, and in pure electronic resonance Raman scattering from both odd— and even—electron ...

Raman electron paramagnetic resonance in Zn1-xCrxTe and Cd1-xCrxTe

Electron Paramagnetic Resonance

where E0 is the energy level without any external magnetic field B = B0êz. Again, g denotes the g factor[5]. For induced transitions, the selection rule is ∆ms = ±1. For unpaired electrons, however, this selection rule is observed for all transitions, as S = 12 and, hence, ms ∈ {− 12 , 2}. The previous formulas are based on the assumption that the response of the material on the external magnet...

Electron Paramagnetic Resonance

Hyperpolarization via dissolution dynamic nuclear polarization (DNP) is a versatile method to dramatically enhance the liquid-state NMR signal of X-nuclei and can be used for performing metabolic and molecular imaging. It was recently demonstrated that instead of incorporating persistent radicals as source of unpaired electron spins, required for DNP, nonpersistent radicals can be photoinduced ...