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Homonuclear Zero-Quantum Recoupling in Fast Magic-Angle Spinning Nuclear Magnetic Resonance

✍ Scribed by Andreas Brinkmann; Jörn Schmedt auf der Günne; Malcolm H. Levitt

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 937 KB
Volume: 156
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.2002.2525

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✦ Synopsis

Solid

-state magic-angle-spinning NMR pulse sequences which implement zero-quantum homonuclear dipolar recoupling are designed with the assistance of symmetry theory. The pulse sequences are compensated on a short time scale by the use of composite pulses and on a longer time scale by the use of supercycles. 13 C dipolar recoupling is demonstrated in powdered organic solids at high spinning frequencies. The new sequences are compared to existing pulse sequences by means of numerical simulations. Experimental two-dimensional magnetization exchange spectra are shown for [U-13 C]-L-tyrosine.

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