Multiple-quantum magic-angle spinning NMR: A new technique for probing quadrupolar nuclei in solids

Citation
A. Medek et L. Frydman, Multiple-quantum magic-angle spinning NMR: A new technique for probing quadrupolar nuclei in solids, J BRAZ CHEM, 10(4), 1999, pp. 263-277
Citations number
80
Categorie Soggetti
Chemistry
Journal title
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
ISSN journal
01035053 → ACNP
Volume
10
Issue
4
Year of publication
1999
Pages
263 - 277
Database
ISI
SICI code
0103-5053(199907/08)10:4<263:MMSNAN>2.0.ZU;2-5
Abstract
We have recently described a new technique capable of recording high resolu tion NMR spectra of half - integer quadrupolar nuclei in solid samples, bas ed on the combined use of magic - angle spinning (MAS) and multiple - quant um (MQ) spectroscopy(1). This review summarizes the basic theoretical aspec ts underlying this high resolution MQMAS NMR experiment, emphasizing as wel l practical aspects involved in the optimization of its signal - to - noise . We also describe the features of MQMAS spectral lineshapes, and exemplify these with a number of applications on various quadrupolar nuclei. Also di scussed is the occurrence of unusual spinning sideband patterns along the m ultiple - quantum domain; additional references to ongoing progress in the area that has appeared in the recent literature are also presented.