original_query: What is the purpose of magic angle spinning in solid-state NMR?
query: What is the purpose of magic angle spinning in solid-state NMR?
answer: Magic angle spinning (MAS) is used to produce narrower and more intense NMR lines by rotating the sample at the magic angle (approximately 54.74°) with respect to the magnetic field. This cancels anisotropic nuclear interactions such as dipolar, chemical shift anisotropy, and quadrupolar interactions, improving spectral resolution.