TITLE

Theoretical aspects of higher-order truncations in solid-state nuclear magnetic resonance

AUTHOR(S)
Goldman, M.; Grandinetti, P. J.; Llor, A.; Olejniczak, Z.; Sachleben, J. R.; Zwanziger, J. W.
PUB. DATE
December 1992
SOURCE
Journal of Chemical Physics;12/15/1992, Vol. 97 Issue 12, p8947
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Recent experimental developments of high-resolution NMR in solids (for example, double rotation and dynamic-angle spinning) address the reduction of second-order line broadening effects, particularly in systems involving quadrupolar nuclei such as 23Na, 17O, 27Al, and 14N. However, some aspects of the theoretical description of these systems have not been clearly understood; in particular, the various procedures available to truncate the interactions give incompatible results. We present a general framework, based on static perturbative methods, which provides a natural procedure to derive the correct Hamiltonian for higher-order effects in irreducible tensor form. Applications of this method to coherent averaging techniques (sample motion or radio-frequency irradiation) are described and compared to previous treatments based on average Hamiltonian theory.
ACCESSION #
7629314

 

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