Magic Angle Spinning

Magic Angle Spinning (MAS) is a technique used in solid-state nuclear magnetic resonance (NMR) spectroscopy to improve data quality. It involves rapidly rotating a sample around an axis tilted at approximately 54.7 degrees—known as the "magic angle"—relative to the magnetic field. This specific angle averages out anisotropic interactions, such as uneven magnetic environments within the sample, which usually cause broad, unclear signals. By doing so, MAS sharpens the signals, enabling detailed analysis of solid materials like minerals or polymers, providing insights into their molecular structure with higher resolution.