Satellite-transition MAS

Satellite transition MAS NMR provides an alternative method for detennining the interactions. The intensity envelope of the spimiing sidebands are dominated by site A2 (using the crystal structure nomenclature) which has the smallest Cq, resulting in the intensity for the transitions of this site being spread over the smallest... 

A related high-resolution technique that was introduced by Gan in 2001 is the satellite-transition MAS (STMAS).2° 2 Routine use of STMAS is still in an infancy stage as various groups are exploring several features of this scheme and improving it further. " ... 

The theory of satellite transition MAS NMR of half-integer quadrupolar spins has been presented and a 2D experiment that uses satellite transitions to obtain isotropic NMR spectra has been described. Pulse sequences of the 2D satellite transition experiment have been described. SateUite transition excitation and coherence transfer have been studied using numerical simulations. Experimental results with model samples show high efficiencies of the experiment for acquisition of high-resolution isotropic NMR of half-integer quadrupolar nuclei. 

In another related article Jerschow has reviewed new high-resolution NMR techniques for the study of quadrupolar nuclei. This article also includes theoretical description of the NMR techniques. A number of topics that are often left out in other review articles, such as nuclear quadrupole resonance, overtone spectroscopy and the ionic model for the calculation of electric field gradients, have also been considered. In addition, high-resolution techniques, such as double rotation, dynamic-angle spinning, MQ MAS, and satellite transition MAS have also been reviewed. 

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