Multiple-quantum cross-polarization in MAS NMR of quadrupolar nuclei

被引：51

作者：

Ashbrook, SE ^{[1
]}

Brown, SP ^{[1
]}

Wimperis, S ^{[1
]}

机构：

[1] Univ Oxford, Phys Chem Lab, Oxford OX1 3QZ, England

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 288卷 / 2-4期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0009-2614(98)00308-X

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：

Using Al-27 (I= 5/2) NMR of aluminium acetylacetonate, we show that it is possible to cross-polarize from a spin I=1/2 nucleus (H-1) directly to the central triple-quantum transition of a half-integer quadrupolar nucleus (Al-27) in a powdered sample under MAS conditions. The optimum conditions for this multiple-quantum cross-polarization (MQCP) are investigated experimentally and compared with existing theoretical results. The new technique is applied to the recently introduced two-dimensional MQMAS experiment for recording high-resolution NMR spectra of half-integer quadrupolar nuclei. (C) 1998 Elsevier Science B.V.

引用

收藏

页码：509 / 517

页数：9

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