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Quasi-Adiabatic Polarization Transfer in Solid-State NMR

✍ Scribed by S.M. Zhang

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
314 KB
Volume
110
Category
Article
ISSN
1064-1858

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✦ Synopsis

A modified Hartmann-Hahn type of cross-polarization experiment is performed with varying amplitudes of the radiofrequency field in a descending or ascending order. The initial spin state evolves quasi-adiabatically in a zero-quantum space to a final state with a larger polarization transfer than that under the matched Hartmann-Hahn condition, which is predicted by a spin flip-flop model to have the most efficient polarization transfer. Experimental results recorded for a sample of ferrocene powder agree qualitatively with the theoretical prediction. c 1994 Academic Press, Inc.

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