High-resolution two-field nuclear magnetic resonance spectroscopy.

Area of Science:

• Nuclear Magnetic Resonance (NMR) Spectroscopy
• Atomic-Scale Matter Exploration
• Spectroscopic Techniques

Background:

• Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful tool for atomic-scale analysis.
• Improvements in NMR sensitivity and resolution are typically achieved by increasing static magnetic field strengths.
• However, high magnetic fields can lead to undesirable effects like line-broadening due to transverse relaxation from chemical shift anisotropy.

Purpose of the Study:

• To present a novel two-field Nuclear Magnetic Resonance (NMR) spectrometer.
• To demonstrate a method that combines low and high magnetic fields for enhanced NMR experiments.
• To explore new avenues for NMR spectroscopy beyond the limitations of single high magnetic fields.

Main Methods:

• Development and implementation of a two-field NMR spectrometer operating at two distinct magnetic fields (14.1 T and 0.33 T).
• Application of radiofrequency (rf) pulses and acquisition of NMR signals at both magnetic centers.
• Execution of novel NMR experiments, including a correlation between zero-quantum coherences at low field and single quantum coherences at high field.

Main Results:

• Successful operation of a prototype two-field NMR spectrometer at 14.1 T and 0.33 T.
• Demonstration of a proof-of-concept correlation between low-field zero-quantum coherences and high-field single quantum coherences.
• Achievement of high resolution in both dimensions of NMR spectra, even with low-field inhomogeneity.

Conclusions:

• Two-field NMR spectroscopy offers a strategy to overcome the limitations associated with solely high magnetic fields.
• This approach allows leveraging the sensitivity and resolution benefits of high fields while mitigating drawbacks.
• The developed system opens new possibilities for advanced NMR applications, potentially exceeding 1 GHz.