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Paper
Cross polarization magic-angle spinning NMR at cryogenic temperatures
Abstract
A magic angle spinning (MAS) apparatus which can be used for high resolution solid state NMR at temperatures as low as 15 K is described. To demonstrate the utility of this apparatus, 13C spectra of molecules containing methyl groups have been investigated at cryogenic temperatures. The spectra, which are described in detail, provide direct evidence for the slowdown of methyl rotation. © 1983.