Dipolar filtered magic-sandwich-echoes as a tool for probing molecular motions using time domain NMR.

We present a simple H NMR approach for characterizing intermediate to fast regime molecular motions using H time-domain NMR at low magnetic field. The method is based on a Goldmann Shen dipolar filter (DF) followed by a Mixed Magic Sandwich Echo (MSE). The dipolar filter suppresses the signals arising from molecular segments presenting sub kHz mobility, so only signals from mobile segments are detected.