PITANSEMA, a low-power PISEMA solid-state NMR experiment

被引：34

作者：

Lee, DK

Narasimhaswamy, T

Ramamoorthy, A ^{[1
]}

机构：

[1] Univ Michigan, Div Biophys Res, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 399卷 / 4-6期

基金：

美国国家卫生研究院; 美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2004.10.017

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 low radio frequency power polarization inversion spin exchange at the magic angle (PISEMA) pulse sequence is described for the measurement of heteronuclear dipolar couplings from solids. The method employs a time averaged nutation concept to significantly reduce the rf power required to spin-lock low gamma nuclear spins in PISEMA experiments. The efficacy of the 2D method is demonstrated on a single crystal of n-acetyl-L-N-15-valyl-L-N-15-leucine dipeptide to measure H-1-N-15 dipolar couplings and a liquid crystal sample to measure H-1-C-13 dipolar couplings. (C) 2004 Elsevier B.V. All rights reserved.

引用

收藏

页码：359 / 362

页数：4

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