A simple and efficient technique, called phase-shift presaturation, for solvent suppression in one-and two-dimensional NMR experiments is proposed and tested. The solvent signal can he considerably suppressed when the traditional presaturation technique is modified by a a/2 shift of the rfphase duri
One- and Two-Dimensional Refocused INADEQUATE NMR Experiments
β Scribed by T. Nakai; C.A. Mcdowell
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 498 KB
- Volume
- 104
- Category
- Article
- ISSN
- 1064-1858
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β¦ Synopsis
We describe details of the refocused INADEQUATE method, which yields in-phase (J) doublets from ({ }^{13} \mathrm{C}-{ }^{13} \mathrm{C}) spin pairs in natural-abundance samples. The procedure for obtaining twodimensional pure-absorptive INADEQUATE spectra is explained. This is used to determine (J) coupling constants with high accuracy because of higher spectral resolution than that obtained in magnitude-mode spectra. The method has been demonstrated using hexanoic acid and hexadecanoic acid as test samples. 1993 Academic Press, Inc.
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