Implementing SPAM into STMAS: A net sensitivity improvement in high-resolution NMR of quadrupolar nuclei

被引:20
作者
Amoureux, JP [1 ]
Delevoye, L
Fink, G
Taulelle, F
Flambard, A
Montagne, L
机构
[1] USTL, ENSCL, CNRS 8012, LCPS, FR-59652 Villeneuve Dascq, France
[2] UVSQ, Versailles, France
关键词
quadrupolar nuclei; MQMAS; STMAS; SPAM;
D O I
10.1016/j.jmr.2005.05.002
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Gan and Kwak recently introduced two new tools for high-resolution 2D NMR methods applied to quadrupolar nuclei: double-quantum filtering in STMAS (DQF-STMAS) and the soft-pulse added mixing (SPAM) idea. Double-quantum filtering suppresses all undesired signals in the STMAS method with limited loss in sensitivity. With SPAM, all pathways are added constructively after the second hard-pulse instead of using a single pathway as previously. Here, the sensitivity, advantages and drawbacks of DQF-STMAS are compared to 3QMAS. Additionally, SPAM can be included into DQF-STMAS method, resulting in a net sensitivity gain with respect to 3QMAS of ca. 10-15. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:285 / 299
页数:15
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