Composite pulses for efficient excitation of half-integer quadrupolar nuclei in NMR of static and spinning solid samples

被引：7

作者：

Carnevale, Diego ^{[1
]}

Bodenhausen, Geoffrey ^{[1
,2
,3
,4
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland

[2] Ecole Normale Super, Dept Chim, F-75231 Paris 05, France

[3] Univ Paris 06, Paris, France

[4] CNRS, UMR 7203, Paris, France

来源：

CHEMICAL PHYSICS LETTERS | 2012年 / 530卷

基金：

瑞士国家科学基金会;

关键词：

HYPERBOLIC SECANT PULSES; QUANTUM CROSS-POLARIZATION; DOUBLE FREQUENCY SWEEPS; SENSITIVITY ENHANCEMENT; CENTRAL-TRANSITION; MQMAS NMR; POPULATION TRANSFERS; AMPLITUDE-MODULATION; MAGNETIC-RESONANCE; SIGNAL ENHANCEMENT;

D O I：

10.1016/j.cplett.2012.01.058

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：

Composite pulses of the type (tau(p))(x)(2 tau(p))(-x)(3 tau(p))(x) allow one to excite the central transition of nuclei with half-integer spin with enhanced efficiency compared to a simple (tau(sp)(p))(x) pulse. The method has been tested on solid samples containing sodium-23 (I = 3/2), aluminium-27 (I = 5/2) and scandium-45 (I = 7/2) under both static and magic-angle spinning conditions. Numerical simulations for I = 3/2 indicate that the enhancement is due to a more efficient conversion of Zeeman population differences associated with the satellite transitions to the central transition. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：120 / 125

页数：6

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