Refocussing of chemical and paramagnetic shift anisotropies in 2H NMR using the quadrupolar-echo experiment

A simple two-pulse spin-echo experiment is shown to refocus inhomogeneous broadening arising from both chemical and/or paramagnetic shift anisotropy and a first-order I = 1 quadrupolar interaction. The method is shown to yield H-2 NMR spectra of a paramagnetic solid (CuCl2 . 2D(2)O) and of a non-paramagnetic solid (D2C2O4 . 2D(2)O) that are significantly less distorted than those provided by the conventional quadrupolar-echo method. The technique will thus prove useful in studies of motion and dynamics where detailed analysis of the H-2 lineshape is performed. (C) 2003 Elsevier Inc. All rights reserved.