Rotary resonance echo double resonance for measuring heteronuclear dipolar coupling under MAS

被引：41

作者：

Gan, Zhehong ^{[1
]}

机构：

[1] Ctr Interdisciplinary Magnet Resonance, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

来源：

JOURNAL OF MAGNETIC RESONANCE | 2006年 / 183卷 / 02期

基金：

美国国家科学基金会;

关键词：

rotary resonance; R-REDOR; REDOR; MAS; dipolar coupling;

D O I：

10.1016/j.jmr.2006.08.014

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A rotary resonance echo double resonance (R-REDOR) experiment is described for measuring heteronuclear dipolar coupling under magic-angle spinning. Rotary resonance reintroduces both dipolar coupling and chemical shift anisotropy with an rf field matching the spinning frequency. The resonance effect from chemical shift anisotropy can be refocused with a rotary resonance echo. The R-REDOR experiment thus measures the dephasing of the rotary resonance echo from the heteronuclear dipolar coupling to determine the dipolar coupling constant. The rotary resonance experiment is suitable for measuring dipolar coupling with quadrupolar nuclei because it applies the recoupling rf only to the observed spin-1/2. The rotary resonance scheme has the advantages of a long T'(2) and susceptible to spinning frequency fluctuation. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：235 / 241

页数：7

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