Modulation-aided signal enhancement in the magic angle spinning NMR of spin-5/2 nuclei
Modulation-aided signal enhancement in the magic angle spinning NMR of spin-5/2 nuclei
We report signal enhancement schemes using fast amplitude modulated pulses for the one-dimensional (I D) nuclear magnetic resonance (NMR) of spin-5/2 nuclei under magic-angle spinning. Signal enhancement by a factor of around 2.5 is observed when amplitude modulated pulses precede selective excitation of the central transition. This enhancement is a result of the redistribution of energy level populations through partial saturation of the satellite transitions. Results are shown for Al-27 and O-17. The gain in signal intensity is very useful for the observation of weak signals from low abundance quadrupolar nuclei. The scheme works for wide ranges of quadrupole interactions and rf powers.
quantum mas nmr, double frequency sweeps, quadrupolar nuclei, coherence, transfer, sensitivity enhancement, amplitude-modulation, magnetic-resonance, i=3/2 nuclei, mqmas nmr, spectroscopy
150-156
Madhu, P.K.
d3e7accb-343e-4ad0-9ef2-56e505202bbb
Pike, K.J.
a03dcf03-b4b1-457f-befe-c49898d58f89
Dupree, R.
f5566766-0ee0-42b6-ad3a-5359b5464ff8
Levitt, M.H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Smith, M.E.
31d9a5fd-9d24-4037-a807-43e30ff3952c
2 January 2003
Madhu, P.K.
d3e7accb-343e-4ad0-9ef2-56e505202bbb
Pike, K.J.
a03dcf03-b4b1-457f-befe-c49898d58f89
Dupree, R.
f5566766-0ee0-42b6-ad3a-5359b5464ff8
Levitt, M.H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Smith, M.E.
31d9a5fd-9d24-4037-a807-43e30ff3952c
Madhu, P.K., Pike, K.J., Dupree, R., Levitt, M.H. and Smith, M.E.
(2003)
Modulation-aided signal enhancement in the magic angle spinning NMR of spin-5/2 nuclei.
Chemical Physics Letters, 367 (1-2), .
(doi:10.1016/S0009-2614(02)01691-3).
Abstract
We report signal enhancement schemes using fast amplitude modulated pulses for the one-dimensional (I D) nuclear magnetic resonance (NMR) of spin-5/2 nuclei under magic-angle spinning. Signal enhancement by a factor of around 2.5 is observed when amplitude modulated pulses precede selective excitation of the central transition. This enhancement is a result of the redistribution of energy level populations through partial saturation of the satellite transitions. Results are shown for Al-27 and O-17. The gain in signal intensity is very useful for the observation of weak signals from low abundance quadrupolar nuclei. The scheme works for wide ranges of quadrupole interactions and rf powers.
This record has no associated files available for download.
More information
Published date: 2 January 2003
Keywords:
quantum mas nmr, double frequency sweeps, quadrupolar nuclei, coherence, transfer, sensitivity enhancement, amplitude-modulation, magnetic-resonance, i=3/2 nuclei, mqmas nmr, spectroscopy
Identifiers
Local EPrints ID: 20037
URI: http://eprints.soton.ac.uk/id/eprint/20037
ISSN: 0009-2614
PURE UUID: 0b50e98c-9a56-4ff2-86cd-fa8a49c1b79c
Catalogue record
Date deposited: 24 Feb 2006
Last modified: 16 Mar 2024 03:18
Export record
Altmetrics
Contributors
Author:
P.K. Madhu
Author:
K.J. Pike
Author:
R. Dupree
Author:
M.E. Smith
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
