Overtone NMR

SS NMR spectroscopy of quadrupolar nuclei is developing very fast. Number of techniques was pubfished last year, for example, QCMPG [59], DOR [60], DAS [61], MQ-MAS [62], ST-MAS [63], overtone NMR [64] and others. Most of them are designed to line narrowing of half-integer nuclei signals. Recent progress in this field was reported by Ashbrook [65]. 

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