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Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo
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Published on: September 26, 2016

Deconvolution of sinusoidal rapid EPR scans.

Mark Tseitlin1, George A Rinard, Richard W Quine

  • 1Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|December 18, 2010
PubMed
Summary

This study presents a Fourier deconvolution method to recover Electron Paramagnetic Resonance (EPR) lineshapes from rapid sinusoidal scans. This technique enables faster data acquisition than previously possible with triangular scans.

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Physical Chemistry

Background:

  • Rapid scan Electron Paramagnetic Resonance (EPR) involves magnetic field scanning faster than electron spin relaxation times.
  • Previous work demonstrated recovering slow-scan EPR lineshapes from triangular rapid scans using Fourier deconvolution.
  • Hardware limitations restrict the speed achievable with triangular rapid scans in EPR spectroscopy.

Purpose of the Study:

  • To develop and demonstrate a general Fourier deconvolution method for recovering slow-scan EPR lineshapes from sinusoidal rapid scans.
  • To enable faster data acquisition in EPR spectroscopy by overcoming limitations of triangular scans.

Main Methods:

  • A general Fourier deconvolution method was developed to process data from sinusoidal rapid scans.
  • A numerical method was employed to calculate the Fourier transform of the sinusoidal driving function.
  • The method was validated by recovering slow-scan EPR lineshapes from lithium phthalocyanine, a trityl radical, and tempone.

Main Results:

  • The developed Fourier deconvolution method successfully recovered slow-scan EPR lineshapes from sinusoidal rapid scans.
  • Recovered lineshapes from sinusoidal scans showed excellent agreement with those obtained from triangular scans.
  • The technique validates the feasibility of using sinusoidal scans for faster EPR data acquisition.

Conclusions:

  • A robust Fourier deconvolution method for sinusoidal rapid scans in EPR spectroscopy has been established.
  • This advancement allows for significantly increased scan speeds compared to triangular scans due to hardware constraints.
  • The method provides accurate slow-scan EPR lineshapes, broadening the applicability of rapid scan techniques.