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Updated: May 20, 2025

Ammonia Synthesis at Low Pressure
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Symmetry Breaking around Aqueous Ammonia Revealed in Nitrogen K-edge X-ray Absorption

Michael Odelius1, Sarai Dery Folkestad2, Thanit Saisopa3

  • 1Department of Physics, Stockholm University, 10691 Stockholm, Sweden.

The Journal of Physical Chemistry Letters
|March 27, 2025
PubMed

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In proton NMR spectroscopy, primary amines and secondary amines showcase their N–H protons as a broad signal in the chemical shift range between δ 0.5 and 5 ppm. The exact position in this range depends on several factors, including sample concentration, hydrogen bonding, and the type of solvent used. Since amine protons undergo fast proton exchange in solution, the protons are labile and therefore do not participate in any splitting with adjacent protons. Thus, the observed peak is...
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