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Two-dimensional nuclear-Zeeman-resolved electron spin echo envelope modulation (NZ-ESEEM) spectroscopy

M Willer1, J Granwehr, J Forrer

  • 1Laboratorium für Physikalische Chemie, Eidgenössische Technische Hochschule, Zürich, CH-8092, Switzerland.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|July 9, 1998
PubMed
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A new nuclear-Zeeman-resolved electron spin echo envelope modulation (ESEEM) method correlates nuclear transition and Zeeman frequencies. This technique enhances electron paramagnetic resonance spectroscopy by analyzing magnetic field interactions with nuclear spins.

Area of Science:

  • Electron Paramagnetic Resonance (EPR) Spectroscopy
  • Pulsed EPR Techniques
  • Solid-State Chemistry

Background:

  • Electron spin echo envelope modulation (ESEEM) is a powerful pulsed EPR technique.
  • Correlating nuclear and electron spin properties is crucial for understanding molecular and material structures.
  • Existing ESEEM methods have limitations in resolving specific nuclear interactions.

Purpose of the Study:

  • To introduce a novel two-dimensional ESEEM experiment, nuclear-Zeeman-resolved ESEEM (NZ-ESEEM).
  • To demonstrate the capability of NZ-ESEEM in correlating nuclear transition frequencies with nuclear Zeeman frequencies.
  • To present the instrumentation and application examples of the new method.

Main Methods:

  • Development of a three-pulse ESEEM sequence.

Related Experiment Videos

  • Incorporation of a magnetic field pulse during the free evolution period.
  • Analysis of the resulting spectral data to resolve nuclear transition and Zeeman frequencies.
  • Main Results:

    • Successful implementation of the nuclear-Zeeman-resolved ESEEM (NZ-ESEEM) experiment.
    • Demonstration of the correlation between nuclear transition frequencies and nuclear Zeeman frequencies.
    • Validation of the method's capacity through two distinct application examples.

    Conclusions:

    • NZ-ESEEM offers enhanced resolution for studying nuclear spin interactions in EPR.
    • The method provides a new tool for detailed structural and dynamic investigations.
    • This technique expands the capabilities of pulsed EPR spectroscopy.