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Correlation of Isotropic and Anisotropic Chemical Shifts in Solids by Two‐Dimensional Variable‐Angle‐Spinning NMR
Author(s) -
Frydman Lucio,
Chingas Gerard C.,
Lee Young K.,
Grandinetti Philip J.,
Eastman Margaret A.,
Barrall Geoffrey A.,
Pines Alexander
Publication year - 1992
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.199200022
Subject(s) - isotropy , anisotropy , chemistry , chemical shift , zeeman effect , spinning , magic angle spinning , solid state nuclear magnetic resonance , nuclear magnetic resonance , nmr spectra database , nuclear magnetic resonance spectroscopy , spectral line , magic angle , molecular physics , magnetic field , pulse sequence , optics , physics , stereochemistry , quantum mechanics , polymer chemistry , astronomy
We describe a new solid‐state nuclear magnetic resonance (NMR) technique for correlating anisotropic and isotropic chemical shifts in powdered samples. Two‐dimensional (2D) NMR spectra are obtained by processing signals acquired in independent experiments for different angles between the sample spinning axis and the Zeeman magnetic field. This 2D NMR approach can therefore resolve individual static anisotropic lineshapes according to their isotropic chemical shift frequencies, without use of sudden mechanical motions or multiple‐pulse irradiation schemes. Applications of the technique are illustrated with an analysis of the chemical shift anisotropy for the eight distinct 13 C sites in tyrosine.