Enhanced conversion of triple to single-quantum coherence in the triple-quantum MAS NMR spectrosocopy of spin-5/2 nuclei

被引：64

作者：

Goldbourt, A ^{[1
]}

Madhu, PK ^{[1
]}

Vega, S ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Chem Phys, IL-76100 Rehovot, Israel

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 320卷 / 5-6期

基金：

以色列科学基金会;

关键词：

D O I：

10.1016/S0009-2614(00)00298-0

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 new type of fast amplitude modulated pulse scheme is presented here that yields a significant sensitivity enhancement in the triple-quantum magic angle spinning NMR spectrum of a spin-5/2 nucleus. Enhancement is achieved by fast phase alternation of the triple to single-quantum conversion pulse, which transfers triple to single-quantum coherence in a direct, non-adiabatic manner. The success of this pulse relies on the difference between the quadrupolar frequency and the intensity of the rf irradiation field, during its short segments. Numerical optimizations and experimental results are presented showing the improved performance. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：448 / 456

页数：9

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