EPR Spectroscopy by Goldfarb Daniella Stoll Stefan & Stefan Stoll

Author:Goldfarb, Daniella,Stoll, Stefan & Stefan Stoll
Language: eng
Format: epub
ISBN: 9781119162988
Publisher: John Wiley & Sons, Inc.
Published: 2018-02-26T00:00:00+00:00

14.3 The Hamiltonian Describing the Nitroxide Spectrum

An isolated nitroxide molecule can be described as a spin system with an electron spin S = ½ coupled to a nuclear spin I = 1 (14N), due to the fact that ≈95% of the spin population is distributed on the nitrogen and oxygen atoms (see energy level diagram in Figure 14.3a). The hyperfine interactions with nearby protons are usually very small and unresolved in the spectral linewidth. The hyperfine interaction with the naturally abundant 13C in the nearby carbon atoms can produce small-intensity doublets around each of the three spectral lines, which are visible when the nitroxide is in the fast isotropic motion limit. The relevant terms to be considered in the spin Hamiltonian are therefore the electron Zeeman, the hyperfine, nuclear Zeeman, and nuclear quadrupole interactions correlated with the I = 1 (14N) (see Chapters 2, 5 and 6):

14.1

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.