In NMR of spins with I = 1/2 in an isotropic phase, it is demonstrated by simulation and experiment that virtually unlimited bandwidths can be decoupled effectively by using chirp pulses with linear frequency modulation for adiabatic inversion combined with phase-cycles and supercycles similar to th
A broadband ADEQUATE pulse sequence using chirp pulses
✍ Scribed by Matthias Köck; Rainer Kerssebaum; Wolfgang Bermel
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 143 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.1097
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✦ Synopsis
Abstract
Recently, we have introduced the ADEQUATE pulse sequence as a sensitive method to observe ^13^C,^13^C correlations in natural products. This kind of experiment suffers from offset‐dependent effects of the 180°(^13^C) pulses. Here we describe an application of smoothed chirp pulses in the ADEQUATE pulse sequence which allows ^13^C,^13^C correlations to be run without any offset dependences. This experiment is called chirp ADEQUATE and was applied to δ‐valerolactone and cholesteryl acetate. This modification will allow a general application of the ADEQUATE pulse sequence. Copyright © 2002 John Wiley & Sons, Ltd.
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The MBOB, broadband HMBC, and broadband XLOC NMR pulse sequences (A. Meissner and O. W. Sørensen (2000, Magn. Reson. Chem. 38, 981-984; 2001, 39, 49-52)) were introduced as a means of obtaining heteronuclear long-range correlation spectra with broadband excitation over an interval of heteronuclear l