Zeeman Mossbauer spectroscopy

Reflecting their aromaticity, porphyrins usually give strong M(Por) + and M(Por) 2+ mass peaks, though some fragmentations of the side chains and loss of the metal from labile metalloporphyrins are often observed.2 The ionization energy of M(TPP) (M = H2, Cu) was reported to be 8.0eV by mass spectrometry. MCD, CD, resonance Raman, Zeeman, ENDOR, ESR and Mossbauer spectroscopies have been reviewed in detail.2... 

The differences in the properties observed by Mossbauer spectroscopy with respect to ferromagnetic particles (see Section F.6) are due, in zero applied field, to the lowering of the Tq factor, and, for in-held experiments, to the small magnitude of the Zeeman energy of the particle compared to the anisotropy energy. 

See also Chemical Applications of EPR Chemicai Shift and Reiaxation Reagents in NMR Cosmo-chemicai Appiications Using Mass Spectrometry Geoiogy and Mineraiogy, Appiications of Atomic Spectroscopy industriai Appiications of iR and Raman Spectroscopy intersteiiar Moiecuies, Spectroscopy of Materiais Science Appiications of X-Ray Diffraction Mossbauer Spectrometers Mossbauer Spectroscopy, Theory Soiid State NMR, Methods Stars, Spectroscopy of Surface Studies By iR Spectroscopy Zeeman and Stark Methods in Spectroscopy, Appiications. 

In contrast to the neutron diffraction which reflects the spatial correlation of spins, Mossbauer spectroscopy reveals information on the time correlation of one spin. If the system is not in thermal equilibrium, these two correlations are not identical. In addition, information can be drawn from the Mossbauer spectra on the electronic state including the charged state of the Fe atoms from the isomer shift, the electric quadrupole splitting and Zeeman splitting due to the internal field. When the specimen is a single crystal, the spin direction can also be determined from intensities of each component of the sextet. 

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