Corrections to the cross-polarization dynamics in solids The effect of nonsecular term of heteronuclear dipolar interaction on cross-relaxation

被引:1
作者
Ding, Shangwu [1 ]
Ye, Chaohui [1 ]
机构
[1] Chinese Acad Sci, Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys, Wuhan 430071, Peoples R China
关键词
cross-polarization; nonsecular terms; amino acids;
D O I
10.1016/0926-2040(93)90014-E
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
The dynamic theory of cross-polarization in solids is modified by considering the contribution of the nonsecular terms of the heteronuclear dipolar interaction Hamiltonian in the laboratory frame to cross-relaxation. This contribution is evaluated numerically and confirmed experimentally. It is shown that these nonsecular terms may play a considerable role in cross-relaxation in many systems, especially in those with fast internal molecular motion. The complication in the cross-polarization process is further revealed.
引用
收藏
页码:321 / 328
页数:8
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