Proton-detected 14N MAS NMR using homonuclear decoupled rotary resonance

被引：134

作者：

Gan, Zhehong ^{[1
]}

Amoureux, Jean Paul

Trebosc, Julien

机构：

[1] Ctr Interdisciplinary Magnet Resonance, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[2] Univ Lille 1, UCCS, CNRS 8181, F-59652 Villeneuve Dascq, France

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 435卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2006.12.066

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A robust sensitivity-enhanced H-1/N-14 MAS HMQC experiment is described for proton-detected N-14 NMR of solids. The sensitivity enhancement is achieved by using dipolar recoupling for coherence transfer with a so-called n = 2 rotary resonance. Rotary resonance occurs when a cw rf field matches certain ratios with the sample spinning frequency, n = omega(1)/omega(r). The theory of rotary resonance for chemical shift anisotropy, heteronuclear and homonuclear dipolar interactions is presented in the irreducible representation. It is shown that the n = 2 rotary resonance decouples the homonuclear dipolar interactions while recoupling the heteronuclear dipolar interaction for proton-detected N-14 NMR. The dipolar recoupling, T'(2) lengthening, and H-1/N-14 HMQC experiment under the n = 2 rotary resonance 2 are demonstrated. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：163 / 169

页数：7

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