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Compact, low-cost NMR spectrometer and probe for dissolution DNP.

Mohammed M Albannay1, Joachim M O Vinther1, Jan Raagaard Petersen1

  • 1Center for Hyperpolarization in Magnetic Resonance, Department of Health Technology, Technical University of Denmark, Ørsteds Plads, 2800 Kgs. Lyngby, Denmark.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|May 10, 2019
PubMed
Summary

A new benchtop Nuclear Magnetic Resonance (NMR) spectrometer with a duplexer supports high-field solid and liquid state NMR applications up to 450 MHz, enabling versatile detection for advanced magnetic resonance studies.

Keywords:
DNP probeDissolution DNPNMR spectrometerSolid-state NMR

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Area of Science:

  • Magnetic Resonance
  • Spectroscopy
  • Physical Chemistry

Background:

  • Advancements in dissolution dynamic nuclear polarization (DNP) polarizers necessitate versatile detection systems.
  • Existing NMR circuits may not meet the frequency requirements for variable magnetic field strengths.

Purpose of the Study:

  • To present a versatile, standalone benchtop NMR spectrometer and circuit.
  • To enable high-field solid and liquid state NMR detection at various frequencies.

Main Methods:

  • Development of a benchtop NMR spectrometer with a duplexer.
  • Detailed analysis of the employed probe design.
  • Investigation of tuning and matching schemes.

Main Results:

  • The spectrometer supports NMR applications up to 450 MHz.
  • Closed-form equations for estimating nutation frequency were derived and experimentally verified.
  • The system allows for remote tuning and matching of sample coils.

Conclusions:

  • The presented NMR spectrometer is a versatile tool for high-field NMR.
  • The developed equations aid in optimizing NMR experiments with remotely tuned coils.