Improved Excitation Schemes for Multiple-Quantum Magic-Angle Spinning for Quadrupolar Nuclei Designed Using Optimal Control Theory

2005 ◽  
Vol 127 (40) ◽  
pp. 13768-13769 ◽  
Author(s):  
Thomas Vosegaard ◽  
Cindie Kehlet ◽  
Navin Khaneja ◽  
Steffen J. Glaser ◽  
Niels Chr. Nielsen
Keyword(s):  
Optimal Control ◽  
Control Theory ◽  
Optimal Control Theory ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Nuclei ◽  
Multiple Quantum ◽  
Angle Spinning

Multiple-quantum magic-angle spinning and dynamic-angle spinning NMR spectroscopy of quadrupolar nuclei

1997 ◽  
Vol 8 (1) ◽  
pp. 1-16 ◽  
Author(s):  
S.H. Wang ◽  
Z. Xu ◽  
J.H. Baltisberger ◽  
L.M. Bull ◽  
J.F. Stebbins ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Nuclei ◽  
Multiple Quantum ◽  
Angle Spinning ◽  
Dynamic Angle

A Comparison of Strategies for Obtaining High-Resolution NMR Spectra of Quadrupolar Nuclei

1996 ◽  
Vol 51 (5-6) ◽  
pp. 321-329 ◽  
Author(s):  
R. E. Youngman ◽  
U. Werner-Zwanziger ◽  
J. W. Zwanziger
Keyword(s):  
High Resolution ◽  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Nuclei ◽  
Multiple Quantum ◽  
Oxide Glasses ◽  
High Resolution Nmr ◽  
Angle Spinning ◽  
Nmr Methods

Abstract A comparison of high-resolution NMR methods for quadrupolar nuclei is presented. The samples studied are pure and modified boron oxide glasses, and the boron NMR spectra are recorded using three different experiments capable of high resolution: Double Rotation, Dynamic Angle Spinning, and Multiple-Quantum Magic Angle Spinning. Resolution of the similar ring and nonring boron sites in these glasses, in the presence of disorder, provides a realistic study of the strengths and limitations of these experiments. Conclusions about the relative applicability of these experiments in different situations are presented.

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