S. Caldarelli et L. Emsley, INTRINSIC ASYMMETRY IN MULTIDIMENSIONAL SOLID-STATE NMR CORRELATION SPECTRA, Journal of magnetic resonance [1997], 130(2), 1998, pp. 233-237
Citations number
22
Categorie Soggetti
Physics, Atomic, Molecular & Chemical","Biochemical Research Methods
Solid-state MAS correlation spectra involving cross polarization will
generally provide spectra which are asymmetric about the main diagonal
. A quantitative treatment of this effect is provided and is demonstra
ted experimentally with examples of two-dimensional spin-diffusion spe
ctra, The effect, which is due to the nonuniform nonequilibrium initia
l coherent state induced by cross polarization, is usually pronounced,
and cannot be eliminated simply. It must be taken into account when q
uantifying solid-state CPMAS correlation spectra. (C) 1998 Academic Pr
ess.