Frequency- and phase-modulated heteronuclear decoupling in rotating solids

被引：75

作者：

Gan, ZH

Ernst, RR

机构：

[1] Lab. für Physikalische Chemie, Eidgenössische TH

来源：

SOLID STATE NUCLEAR MAGNETIC RESONANCE | 1997年 / 8卷 / 03期

关键词：

solid state NMR; heteronuclear decoupling; TPPM; frequency modulation; phase modulation; magic angle spinning;

D O I：

10.1016/S0926-2040(96)01294-5

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 mechanism of heteronuclear dipolar decoupling by the TPPM sequences, proposed by Bennett et al. (J. Chem. Phys. 103 (1995) 6951) is investigated by comparison with a modified pulse sequence, called TPFM, that uses frequency instead of phase modulation. By combining frequency and phase modulations, circularly modulated sequences are designed. The fact that only the left-handed modulation sequence FMPML leads to improved proton decoupling, while the right-handed modulation sequence FMPMR is ineffective, proves that the efficient decoupling is caused by a secondary resonance effect. (C) 1997 Elsevier Science B.V.

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页码：153 / 159

页数：7

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