High resolution, high sensitivity proton NMR spectra of solids obtained using continuous wavelet transform analysis

The application of continuous wavelet transform (CWT) analysis to the free- induction decay (FID) signals of SPEDA (single pulse excitation with delaye d acquisition) solid state NMR spectroscopy is demonstrated to yield high s ensitivity, high resolution, phase corrected and quantitative proton spectr a, without using homonuclear decoupling or high speed sample rotation. More over, a better description of the spin dynamics (the time evolution of the resonance frequencies) can be obtained from the CWT spectrogram. Three typi cal polycrystalline compounds are used to verify the versatility of this te chnique which generates spectra with the same, or higher, quality on compar ison with those obtained using the CRAMPS (combined rotation and multiple p ulse spectroscopic) technique. (C) 2000 Elsevier Science B.V. All rights re served.