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Improved NMR methods for the direct 13C-satellite-selective excitation in overlapped 1H-NMR spectra

✍ Scribed by Pau Nolis; Sergio Gil; Juan Félix Espinosa; Teodor Parella

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
640 KB
Volume
47
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Improved pulsed‐field gradient echo methods are presented and discussed for the direct selective excitation of the ^13^C‐satellite lines in overcrowded ^1^H NMR spectra of small molecules. Sensitivity enhancements in ^13^C spin‐state selection can be achieved by combining multiple‐proton‐frequency excitation and Hadamard phase encoding. Several satellite‐selective (SATSEL) NMR experiments are proposed and exemplified by measuring the sign and the magnitude of small, long‐range proton–carbon coupling constants for ^1^H resonances showing several levels of signal overlapping. Copyright © 2008 John Wiley & Sons, Ltd.

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