## 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