MOLECULAR-DYNAMICS FROM H-2 QUADRUPOLAR CARR-PURCELL-MEIBOOM-GILL SOLID-STATE NMR-SPECTROSCOPY

The H-2 quadrupolar Carr-Purcell-Meiboom-Gill (QCPMG) NMR experiment i s proposed as a convenient method to obtain detailed information about molecular dynamics in solids. Compared to the quadrupolar-echo (QE) e xperiment QCPMG offers two advantages. First, a sensitivity enhancemen t by about an order of magnitude is achieved by splitting the QE spect rum into spin-echo sidebands. Second, the lineshape of the individual sidebands provides detailed information about the molecular dynamics a nd increases the dynamic range by two orders of magnitude. The H-2 QCP MG method is demonstrated experimentally and numerically using the two -fold flip process in dimethyl sulfone, (C) 1998 Elsevier Science B.V. All rights reserved.