Motional broadening: an important distinction between multiple-quantum and satellite-transition MAS NMR of quadrupolar nuclei
Multiple-quantum (MQ) and satellite-transition (ST) magic-angle spinning (MAS) are two very similar techniques used to obtain high-resolution or 'isotropic' NMR spectra of half-integer quadrupolar nuclei. In a variety of materials it is observed that some STMAS peaks are very broad compared with the corresponding MQMAS peaks, sometimes so broad that they are unobservable. We present 17O (I = 5/2) NMR spectra of two materials, chondrodite (2Mg2SiO4. Mg(OH)2) and clinohumite (4Mg2SiO4.Mg(OH)2),...[Show more]
|Collections||ANU Research Publications|
|Source:||Chemical Physics Letters|
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