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QCPMG-MAS NMR of Half-Integer Quadrupolar Nuclei

โœ Scribed by Flemming H. Larsen; Hans J. Jakobsen; Paul D. Ellis; Niels Chr. Nielsen

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
97 KB
Volume
131
Category
Article
ISSN
1090-7807

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โœฆ Synopsis

By combination of fast magic-angle spinning (MAS) and detection of the free-induction decay during a rotor-synchronized quadrupolar Carr-Purcell-Meiboom-Gill (QCPMG) train of refocusing pulses, the sensitivity of quadrupolar-echo MAS NMR spectra for the central transition of half-integer quadrupolar nuclei exhibiting large quadrupolar couplings may be significantly enhanced. Enhancements by an order of magnitude may easily be realized while maintaining information about the anisotropic interactions. In the present study the so-called QCPMG-MAS experiment is demonstrated experimentally and by numerical simulations for the two 87Rb sites in Rb2SO4.

๐Ÿ“œ SIMILAR VOLUMES

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We demonstrate the utility of a two-pulse sequence in obtaining high-resolution solid state NMR spectra of half-integer quadrupolar nuclei with magic-angle-spinning (MAS). The experiment, which utilizes multiple/single-quantum correlation, was first described in a different form by Frydman and Harwo

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