NuMega Resonance Labs

Boron NMR

NMR Testing Services, Mass Spec, Elemental Analysis and Optical Rotation

Boron is an emerging element of interest due to its unique chemical properties arising from its empty p-orbital. Characterization of boron by NMR is typically done with the B-11 isotope due to higher sensitivity (higher magnetogyric constant) and greater natural abundance leading to sharper signal. B-10 can also be used for NMR but generally leads to broader signals. If the sample is enriched with B-10, however, it would be the more ideal isotope to use. Common chemical shifts of different boron-containing derviatives are shown above. Due to many NMR tubes being made from borosilicate glass as well as the presence of Boron in some probes, spectra of B-11 tend to have a broad signal along the baseline from these sources. Special quartz NMR tubes can be used to reduce the impact of this background.