Analysis of alkyl phosphonate mixtures
In nuclear magnetic resonance (NMR) analysis of phosphorus-containing compounds, 1H and 13C signals near phosphorus are affected by heteronuclear spin couplings. Given the natural abundance of 31P at 100%, these splittings are easily visible, reducing sensitivity and increasing complexity. Additionally, some of these compounds are unstable in solvents, leading to the formation of decomposition products, which further complicates the interpretation of 1H and 13C spectra. On the other hand, when analyzing phosphorus-containing samples, 31P NMR information can be invaluable for structural analysis. To illustrate this, we will provide some examples below. In the measurements detailed in this application note, we utilized the ROYALPROBE™ P+ [1], capable of 1H, 31P, and X triple-resonance (HF) and two low-frequency (LF) channels.