Multiple-quantum cross polarization in quadrupolar spin systems during magic-angle spinning

被引：35

作者：

Rovnyak, D ^{[1
]}

Baldus, M

Griffin, RG

机构：

[1] Harvard Univ, MIT, Ctr Magnet Resonance, Francis Bitter Magnet Lab, Cambridge, MA 02139 USA

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

JOURNAL OF MAGNETIC RESONANCE | 2000年 / 142卷 / 01期

关键词：

solid-state NMR; multiple-quantum MAS (MQMAS); rotation-induced adiabatic coherence transfer (RIACT); dipolar coupling; radiofrequency amplitude modulation;

D O I：

10.1006/jmre.1999.1922

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We describe the concept of multiple-quantum cross polarization (CP) between an I = 3/2 and an I = 1/2 spin during magic-angle spinning. Experimental and theoretical results for Na-23-H-1 pairs are presented that elucidate the transfer mechanism and the beneficial effect of adiabatic amplitude modulations of the CP field. The multiple-quantum CP approach is shown to be beneficial for improving the sensitivity of CP-MQMAS experiments and for detecting dipolar correlations. (C) 2000 Academic Press.

引用

页码：145 / 152

页数：8

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