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Improvement of the two-dimensional INADEQUATE technique by a ‘double selection’ experiment

✍ Scribed by D. Piveteau; M. A. Delsuc; E. Guittet; J. Y. Lallemand

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 283 KB
Volume: 23
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260230216

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✦ Synopsis

The two-dimensional NMR INADEQUATE pulse sequence allows unambiguous determination of spin-spin connectivities, especially for dilnte spins such as -C, through the double-quantum transitions of the spin system. A development of the sequence is presented which allows sign-sensitive detection in the Fl dimension. The selectiou is obtained at two distinct stages, creation and observation of the double-quantum transitions. The originality of the proposed sequence consists in a simultaneous modilktion of the traditional phase programme and pulse angles. A judicious choice of pulse phases is shown, both theoretically and experimentally, to activate the third pulse; modification of its value can then improve the selectivity of the experiment.

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