UNSPECIFIED (2003) Modulation-aided signal enhancement in the magic angle spinning NMR of spin-5/2 nuclei. CHEMICAL PHYSICS LETTERS, 367 (1-2). pp. 150-156. ISSN 0009-2614

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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. (C) 2002 Elsevier Science B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QC Physics
Journal or Publication Title:	CHEMICAL PHYSICS LETTERS
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0009-2614
Date:	2 January 2003
Volume:	367
Number:	1-2
Number of Pages:	7
Page Range:	pp. 150-156
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/10159

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