Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
116 (2002), S. 710-722
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
A double-quantum filtered nuclear magnetic resonance experiment is applied to half-integer quadrupolar nuclei in solids. Filtering through a double-quantum coherence excited in a dipolar-coupled two-spin system allows spatial correlations between spins to be determined. Theoretical and experimental investigations have been carried out to optimize the excitation of double-quantum coherence between the central transitions of two neighboring nuclei while minimizing double-quantum excitation on each individual spin. The presence of the large quadrupolar coupling in the systems under study allows multiple-quantum excitation via the dipolar coupling between two spins even under conditions of magic-angle spinning, without the need for a recoupling sequence. Two-dimensional double-quantum-filtered correlation spectra have been recorded on 23Na (I=〈fraction SHAPE="CASE"〉32) for Na2ZrO3 which contains three distinct 23Na sites. © 2002 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1425831
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