A SIMPLE MAGIC ANGLE SPINNING NMR EXPERIMENT FOR THE DEPHASING OF ROTATIONAL ECHOES OF DIPOLAR COUPLED HOMONUCLEAR SPIN PAIRS

被引：175

作者：

GULLION, T

VEGA, S

机构：

[1] Chemistry Department, Washington University, St. Louis

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 194卷 / 4-6期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

D O I：

10.1016/0009-2614(92)86076-T

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 simple NMR experiment for the dephasing of the rotational echo amplitudes of homonuclear dipolar coupled spin pairs in solids rotating at the magic angles is described. The dephasing is generated by pi-pulses applied synchronously with the sample rotation. One pi-pulse per rotor cycle is sufficient to cause an echo decay when the homonuclear dipole interaction is present. The dephasing effect of the pi-pulses is described using Floquet theory. Experimental results obtained on a doubly C-13-labeled alanine are presented and compared with numerical calculations. Effects arising from finite pulse lengths are also demonstrated and discussed.

引用

页码：423 / 428

页数：6

共 28 条

[1]

ALLA MA, 1978, JETP LETT+, V27, P194

[2]

ANDREW ER, 1971, PROGR NMR, V8

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