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Sample Restriction Using Magnetic Field Gradients in High-Resolution Solid-State NMR

✍ Scribed by Patrick Charmont; Anne Lesage; Stefan Steuernagel; Frank Engelke; Lyndon Emsley

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 91 KB
Volume: 145
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.2000.2117

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✦ Synopsis

Many solid-state NMR experiments are sensitive to inhomogeneity in the radiofrequency field. We propose a method to restrict the sample volume, in magic angle spinning experiments, using a static magnetic field gradient and a selective pulse. The position of the gradient is calculated for our experimental configuration and we have simulated the effects of selective pulses to determine the excited volume. The resulting sequences are applied to a sample of sodium acetate using frequency-switched Lee-Goldburg proton-proton homonuclear dipolar decoupling. A gain of a factor of 2 on the carbon resolution is experimentally observed. Copyright 2000 Academic Press.

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