Solid State Measurements in High Resolution

Because of the biological importance of nitrogen linkages, including hydrogen 

The axis of lowest shielding lies in the plane of the peptide linkage and nearly orthogonal to the C-N bond single crystal study. Axial symmetry perturbed by hydrogen bonding to NH.  

Nitrogen NMR can be a powerful tool for adsorption studies, distinguishing different sites such as Lewis or Br0nsted acids, cations, channels for physisorption, etc. A standard 90 MHz spectrometer was used to demonstrate strong SiOH N bonding of pyridine to silica gel, and interactions with zeolites of NH3, MejN, MeCN, and pyridine. CP-MAS N spectra are reported for pyridine on y-alumina and mor- 

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