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Electron Spin Resonance Linewidth Studies of Vanadyl Tetraphenylporphyrine

  • Ali H. Al-Mowali
  • Alhan D. Girgees
Conference paper

Abstract

The linewidth of the hyperfine components of the ESR spectra of vanadyl tetraphenylporphyrin in liquid toluene have been measured as a function of temperature and analysed in detail.

This has enabled the separate contributions to the observed ESR linewidths from spin rotational interaction, g-tensor anisotropy, hyperfine coupling anisotropy, and unresolved nitrogen hyperfine coupling to be evaluated. These results have used to estimate the size of the nitrogen isotropic hyperfine coupling constant and thus the extent of delocalisation of the unpaired electron on to the nitrogen atoms.

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • Ali H. Al-Mowali
    • 1
  • Alhan D. Girgees
    • 1
  1. 1.Department of Chemistry, College of ScienceUniversity of BasrahBasrahIraq

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