Theory and applications of supercycled symmetry-based recoupling sequences in solid-state nuclear magnetic resonance
Theory and applications of supercycled symmetry-based recoupling sequences in solid-state nuclear magnetic resonance
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DOI：
10.1063/1.2205857
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发表时间：
2006-06-21
影响因子：
4.4
通讯作者：
Levitt, Malcolm H.
中科院分区：
文献类型：
--
作者：
Kristiansen, Per Eugen;Carravetta, Marina;Levitt, Malcolm H.
本文介绍了固态魔角旋转核磁共振中超循环磁共振重耦合序列的理论原理。我们讨论了SR 26脉冲序列的构造过程，这是一个特别强大的双量子同向偶极-偶极重耦合序列。超循环去除了破坏性的高阶平均哈密顿项，并使序列在长时间间隔内保持稳健。我们展示了SR 26序列在双量子光谱学、同向自旋计数和确定化学位移各向异性张量的相对取向方面的应用。(c)2006年，美国物理学会。
We present the theoretical principles of supercycled symmetry-based recoupling sequences in solid-state magic-angle-spinning NMR. We discuss the construction procedure of the SR26 pulse sequence, which is a particularly robust sequence for double-quantum homonuclear dipole-dipole recoupling. The supercycle removes destructive higher-order average Hamiltonian terms and renders the sequence robust over long time intervals. We demonstrate applications of the SR26 sequence to double-quantum spectroscopy, homonuclear spin counting, and determination of the relative orientations of chemical shift anisotropy tensors. (c) 2006 American Institute of Physics.