Quadrupolar spin resonance (QSR) is a form of radio-frequency spectroscopy applied to solids, akin to solid-state NMR spectroscopy.  However, QSR is applied in the absence or a low magnetic field. 

QSR is applied to the quadrupolar nuclei, such as nitrogen-14, chlorine-35, and much more. In fact, the majority of the elements of the periodic table can be investigated by QSR spectroscopy.

The resolution obtained from QSR is unrivalled by NMR. This allows QSR spectroscopy to excel at:

• Identifying unknown substances & minerals

• Expediting chemical product development

• Characterizing green functional materials

• Assuring the quality of manufactured chemical products

Pharmaceutical Analysis
Our recent book chapter titled Nuclear Quadrupole Resonance Spectroscopy in Pharmaceuticals in the book Magnetic Resonance and its Applications in Drug Formulation and Delivery is now available at the RSC!

Comparing QSR spectroscopy to NMR spectroscopy
We previously published a concepts article comparing solid-state NMR spectroscopy to QSR spectroscopy. Read more about it here.