Abstract
In dynamic-angle spinning (DAS), a sample spins around an axis inclined at an angle [Formula presented] with respect to the magnetic field such that the averages of [Formula presented] are zero. The simplest case is where [Formula presented] assumes two discrete values [Formula presented] and [Formula presented] (complementary DAS angles) such that the averages of [Formula presented] and [Formula presented] are zero, thereby removing second-order quadrupolar (and dipolar) broadening. Examples of DAS complementary angles are [Formula presented] and [Formula presented]. Experimental details for DAS experiments are provided and applications to sodium-23 and oxygen-17 NMR illustrate the enhanced resolution achieved by removing the second-order broadening inherent in magic-angle spinning.
Original language | English (US) |
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Pages (from-to) | 298-315 |
Number of pages | 18 |
Journal | Journal of Magnetic Resonance |
Volume | 213 |
Issue number | 2 |
DOIs | |
State | Published - Dec 2011 |
All Science Journal Classification (ASJC) codes
- Biophysics
- Biochemistry
- Nuclear and High Energy Physics
- Condensed Matter Physics