Analytical theory of γ-encoded double-quantum recoupling sequences in solid-state nuclear magnetic resonance

被引：25

作者：

Pileio, Giuseppe ^{[1
]}

Concistre, Maria ^{[1
]}

McLean, Neville ^{[1
]}

Gansmulller, Axel ^{[1
]}

Brown, Richard C. D. ^{[1
]}

Levitt, Malcolm H. ^{[1
]}

机构：

[1] Univ Southampton, Sch Chem, Southampton SO17 1BJ, Hants, England

来源：

JOURNAL OF MAGNETIC RESONANCE | 2007年 / 186卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

recoupling; symmetry-based recoupling; magic-angle-spinning; Fresnel; solid-state NMR;

D O I：

10.1016/j.jmr.2007.01.009

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Many important double-quantuin recoupling techniques in solid-state NMR are classified as being gamma-cncoded. This means that the phase of the double-quantum effective Hamiltonian, but not its amplitude, depends on the third Euler angle defining the orientation of the molecular spin system in the frame of the magic-angle-spinning rotor. In this paper, we provide closed analytical solutions for the dependence of the powder-average double-quantum-filtered signal on the recoupling times, within the average Hamiltonian approximation for gamma-encoded pulse sequences. The validity of the analytical Solutions is tested by numerical simulations. The internuclear distance in a C-13(2)-labelled retinal is estimated by fitting the analytical Curves to experimental double-quantum data. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：65 / 74

页数：10

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