Effects of Phase Cycling on Quantum Coherence Pathways in Satellite Transition Magic Angle Spinning Experiments

Abstract

Multiple quantum experiments are used to resolve broad peaks in nuclear magnetic resonance spectra of quadrupolar nuclei. In this work, we study phase cycling of radio frequency pulses in a single quantum satellite transition magic angle spinning experiment. The particular pulse sequence is a shifted echo sequence where phases of the pulses are varied in accordance with coherence selection rules. Experiments were performed on a $^{17}$O enriched sample of SiO$_2$. Results show that certain phase sequences may decrease the full width at half maximum of spectral peaks.