Simple and efficient decoupling in magic-angle spinning solid-state NMR: the XiX scheme

被引:218
作者
Detken, A [1 ]
Hardy, EH [1 ]
Ernst, M [1 ]
Meier, BH [1 ]
机构
[1] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland
关键词
D O I
10.1016/S0009-2614(02)00335-4
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
We propose a simple heteronuclear decoupling scheme for spin-1/2 nuclei under magic-angle sample spinning (MAS). The sequence, called XiX, consists of windowless rf irradiation with a repeat of two pulses of equal width, phase-shifted by 180degrees. The XiX scheme is found to be, within certain limits, insensitive to the flip angle of the individual pulses but only sensitive to the pulse width in units of the rotor period. It is therefore easier to implement and optimize than previously used sequences. The new sequence can lead to a significant improvement in decoupling over published sequences, in particular at high MAS frequencies. (C) 2002 Published by Elsevier Science B.V.
引用
收藏
页码:298 / 304
页数:7
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