✦ LIBER ✦
Application of DEFT and SEFT for signal-to-noise ratio enhancement and T2-selective spectra in 29Si MAS NMR of zeolites
✍ Scribed by Michael W. Anderson
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 520 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
Driven equilibrium and spin–echo Fourier transform spectroscopy (DEFT and SEFT) were used to observe ^29^Si high‐resolution solid‐state nuclear magnetic resonance with magic‐angle spinning (MAS NMR) spectra of zeolites. The sequences allow the measurement of T~2~ relaxation times, dramatic improvements in signal‐to‐noise ratios and selective observation of signals with long T~2~ relaxation times. This last criterion permits the simplification of ^29^Si spectra of highly aluminous zeolites, yielding important crystallographic information.