The illusions of spin decoupling

The action of heteronuclear decoupling applied to I spins while observing the resonance of a 2nd nuclear species S is examd. for systems prepd. in an arbitrary initial state. Unexpected effects may be produced; the removal of heteronuclear interactions by strong decoupling fields does not guarantee that the 2 spin systems behave independently. In particular, antiphase multiplet magnetization of the S spins remains directly responsive to the radio-frequency I spin perturbation, and to I-I interactions, even when the decoupling removes the heteronuclear coupling interactions completely. Some simple illustrative examples are examd. theor. and exptl. [on SciFinder (R)]

Published in:
Journal of Magnetic Resonance, 53, 3, 443-61

 Record created 2006-02-22, last modified 2018-03-17

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