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Rotor-driven spin diffusion in natural-abundance 13C spin systems

✍ Scribed by M.G. Colombo; B.H. Meier; R.R. Ernst

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
641 KB
Volume
146
Category
Article
ISSN
0009-2614

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✦ Synopsis

A novel method for enhancing carbon spin diffusion in magic-angle spinning NMR experiments of solid samples is presented. The energy balance for the flip-flop process of two carbon-13 spins is provided by coupling to the mechanical rotation of the sample. Thus requires that the rotor frequency is adjusted to an integer fraction of the isotropic chemical shift difference between two particular carbon resonances. The spin-diffusion rate constant is found to be enhanced by more than two orders of magnitude in threonine with natural isotopic abundance.

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