Multiple quantum NMR and relaxation of an oriented CH3group

摘要

NMR relaxation of thenhyphen;quantum transitions lpar;n=1,2,3rpar; for an oriented CH3group by paramagnetic impurities is discussed. Thenhyphen;quantum spectra are presented, and the effect of the correlation of fluctuations in random fields at the three proton sites on symmetryhyphen;breaking relaxation transitions is outlined. Experimental results on acetonitrile dissolved in liquid crystalline EBBA with paramagnetic DTBN are presented together with a discussion on correlations of fluctuation and correlation times.