NMR of samples containing metal foils

Area of Science:

• Solid-state Nuclear Magnetic Resonance (NMR) spectroscopy.
• Materials science.
• Electrochemistry.

Background:

• Studying static organic materials with Nuclear Magnetic Resonance (NMR) can be challenging due to spectral broadening.
• Macroscopic metal foils often interfere with standard NMR analysis.
• Existing techniques may not be suitable for samples involving metal components.

Purpose of the Study:

• To develop a method for obtaining high-quality 13C NMR spectra of static organic samples attached to aluminum foil.
• To improve spectral resolution and enable the study of challenging sample types using NMR.
• To investigate the application of magic-angle hopping (MAH) with specific sample configurations.

Main Methods:

• Utilizing spool configurations where the sample (organic material on aluminum foil) is arranged coaxially with the RF coil.
• Employing aluminum foil or fine aluminum powder as a component of the sample.
• Implementing the magic-angle hopping (MAH) technique in conjunction with the spool configuration.

Main Results:

• High-quality 13C NMR spectra were obtained from static organic samples on aluminum foil.
• The combination of spool configuration and MAH technique achieved a high degree of isotropic averaging.
• This method effectively overcomes spectral broadening issues associated with metal foil substrates.

Conclusions:

• The described spool configuration is effective for high-quality 13C NMR of static organic materials on aluminum foil.
• Magic-angle hopping (MAH) significantly enhances spectral resolution for such samples.
• This technique broadens the applicability of NMR to study thin films on metal foils and electrochemical systems with metal electrodes.