Signal enhancement in the triple-quantum magic-angle spinning NMR of spins-3/2 in solids: the FAM-RIACT-FAM sequence
Signal enhancement in the triple-quantum magic-angle spinning NMR of spins-3/2 in solids: the FAM-RIACT-FAM sequence
We achieve a significant signal enhancement for the triple-quantum magic-angle spinning NMR of a spin-3/2 system, by using an amplitude-modulated radiofrequency field, followed by a selective 90° pulse and a phase-shifted strong rf field, for the triple-quantum excitation, and an amplitude-modulated radiofrequency field for the conversion of triple-quantum coherence to observable single-quantum coherence. The experiment is demonstrated on the Rb-87 NMR of polycrystalline rubidium nitrate.
nuclear-magnetic-resonance, double frequency sweeps, quadrupolar nuclei, mas-nmr, sensitivity enhancement, amplitude-modulation, coherence transfer, i=3/2 nuclei, mqmas nmr, spectroscopy
150-155
Madhu, P.K.
d3e7accb-343e-4ad0-9ef2-56e505202bbb
Levitt, M.H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
2002
Madhu, P.K.
d3e7accb-343e-4ad0-9ef2-56e505202bbb
Levitt, M.H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Madhu, P.K. and Levitt, M.H.
(2002)
Signal enhancement in the triple-quantum magic-angle spinning NMR of spins-3/2 in solids: the FAM-RIACT-FAM sequence.
Journal of Magnetic Resonance, 155 (1), .
(doi:10.1006/jmre.2002.2508).
Abstract
We achieve a significant signal enhancement for the triple-quantum magic-angle spinning NMR of a spin-3/2 system, by using an amplitude-modulated radiofrequency field, followed by a selective 90° pulse and a phase-shifted strong rf field, for the triple-quantum excitation, and an amplitude-modulated radiofrequency field for the conversion of triple-quantum coherence to observable single-quantum coherence. The experiment is demonstrated on the Rb-87 NMR of polycrystalline rubidium nitrate.
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Published date: 2002
Keywords:
nuclear-magnetic-resonance, double frequency sweeps, quadrupolar nuclei, mas-nmr, sensitivity enhancement, amplitude-modulation, coherence transfer, i=3/2 nuclei, mqmas nmr, spectroscopy
Identifiers
Local EPrints ID: 19816
URI: http://eprints.soton.ac.uk/id/eprint/19816
PURE UUID: 8645a571-f672-4044-af4b-bbe54a5a0715
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Date deposited: 21 Feb 2006
Last modified: 16 Mar 2024 03:18
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Author:
P.K. Madhu
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