Enhanced triple-quantum excitation in 13C magic-angle spinning NMR
Enhanced triple-quantum excitation in 13C magic-angle spinning NMR
We describe a new method for exciting triple-quantum coherences in 13C-labelled powder samples under MAS. The proposed method combines selective double-quantum excitation with rotational resonance and frequency-selective composite pulses. The spin dynamics of this new method are described theoretically. Numerical calculations of the spin dynamics are compared to experimental results on fully 13C-labelled (L)-alanine. The observed triple-quantum filtering efficiency is around 10% for the most intense spectral peak. The method is also demonstrated on other fully 13C-labelled compounds, including a uniformly 13C-labelled amino acid.
solid-state nmr, nuclear-magnetic-resonance, molecular torsional angle, rotating solids, distance measurements, symmetry principles, pulsesequences, l-alanine, spectroscopy, systems
443-453
Carravetta, Marina
1b12fa96-4a6a-4689-ab3b-ccc68f1d7691
Schmedt auf der Günne, Jörn
cf66631b-52b3-4280-a696-17853a6e7322
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
2003
Carravetta, Marina
1b12fa96-4a6a-4689-ab3b-ccc68f1d7691
Schmedt auf der Günne, Jörn
cf66631b-52b3-4280-a696-17853a6e7322
Levitt, Malcolm H.
bcc5a80a-e5c5-4e0e-9a9a-249d036747c3
Carravetta, Marina, Schmedt auf der Günne, Jörn and Levitt, Malcolm H.
(2003)
Enhanced triple-quantum excitation in 13C magic-angle spinning NMR.
Journal of Magnetic Resonance, 162 (2), .
(doi:10.1016/S1090-7807(03)00059-4).
Abstract
We describe a new method for exciting triple-quantum coherences in 13C-labelled powder samples under MAS. The proposed method combines selective double-quantum excitation with rotational resonance and frequency-selective composite pulses. The spin dynamics of this new method are described theoretically. Numerical calculations of the spin dynamics are compared to experimental results on fully 13C-labelled (L)-alanine. The observed triple-quantum filtering efficiency is around 10% for the most intense spectral peak. The method is also demonstrated on other fully 13C-labelled compounds, including a uniformly 13C-labelled amino acid.
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Published date: 2003
Keywords:
solid-state nmr, nuclear-magnetic-resonance, molecular torsional angle, rotating solids, distance measurements, symmetry principles, pulsesequences, l-alanine, spectroscopy, systems
Organisations:
Chemistry
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Local EPrints ID: 19924
URI: http://eprints.soton.ac.uk/id/eprint/19924
PURE UUID: 2b3e24dd-821a-4bc4-b0c0-1ab843cca065
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Date deposited: 23 Feb 2006
Last modified: 16 Mar 2024 03:29
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Author:
Jörn Schmedt auf der Günne
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