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research article

Broadband excitation and indirect detection of nitrogen-14 in rotating solids using Delays Alternating with Nutation (DANTE)

Vitzthum, Veronika  
•
Caporini, Marc A.  
•
Ulzega, Simone  
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2011
Journal of Magnetic Resonance

A train of short rotor-synchronized pulses in the manner of Delays Alternating with Nutations for Tailored Excitation (DANTE) applied to nitrogen-14 nuclei (I = 1) in samples spinning at the magic angle at high frequencies (typically nu(rot) = 62.5 kHz so that tau(rot) = 16 mu s) allows one to achieve uniform excitation of a great number of spinning sidebands that arise from large first-order quadrupole interactions, as occur for aromatic nitrogen-14 nuclei in histidine. With routine rf amplitudes omega(1)(N-14)/(2 pi) = 60 kHz and very short pulses of a typical duration 0.5 < tau(p) < 2 mu s, efficient excitation can be achieved with 13 rotor-synchronized pulses in 13 tau(rot) = 208 mu s. Alternatively, with 'overtone' DANTE sequences using 2, 4, or 8 pulses per rotor period one can achieve efficient broadband excitation in fewer rotor periods, typically 2-4 tau(rot). These principles can be combined with the indirect detection of N-14 nuclei via spy nuclei with S = 1/2 such as H-1 or C-13 in the manner of Dipolar Heteronuclear Multiple-Quantum Correlation (D-HMQC). (C) 2011 Elsevier Inc. All rights reserved.

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Type
research article
DOI
10.1016/j.jmr.2011.06.013
Web of Science ID

WOS:000294750500029

Author(s)
Vitzthum, Veronika  
Caporini, Marc A.  
Ulzega, Simone  
Bodenhausen, Geoffrey  
Date Issued

2011

Publisher

Academic Press Inc - Elsevier Science

Published in
Journal of Magnetic Resonance
Volume

212

Issue

1

Start page

234

End page

239

Subjects

Nitrogen-14 NMR

•

Delays Alternating with Nutations for Tailored Excitation (DANTE)

•

Dipolar Heteronuclear Multiple-Quantum Correlation (D-HMQC)

•

Solid-state NMR

•

Magic angle spinning (MAS)

•

Broadband excitation

•

Quadrupolar nuclei

•

Nuclear-Magnetic-Resonance

•

Nmr-Spectroscopy

•

Selective Excitation

•

State Nmr

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LRMB  
Available on Infoscience
November 1, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/72141
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