An improved broadband decoupling sequence for liquid crystals and solids
An improved broadband decoupling sequence for liquid crystals and solids
复制标题
DOI：
10.1006/jmre.1999.1896
复制
发表时间：
2000-01-01
影响因子：
2.2
通讯作者：
Ermolaev, K
中科院分区：
文献类型：
--
作者：
Fung, BM;Khitrin, AK;Ermolaev, K
最近，我们开发了一种用于液晶的高效宽带去耦合序列SPARC-16[J，Magn。雷森。130,317(1998)]。该序列基于固体的两步TPPM解耦方法的16步相循环[J.太棒了。103,6951(1995)]。从那时起，我们发现在TPPM序列中逐步改变相角可以提供更好的结果。报道了这种新方法在液晶化合物4-正戊基-4‘-氰基联苯和固体化合物L酪氨酸盐酸盐中的应用。通过对旋转机架问题的分析，说明了改进的原因。(C)2000年学术出版社。
Recently we developed an efficient broadband decoupling sequence called SPARC-16 for liquid crystals [J, Magn. Reson. 130, 317 (1998)]. The sequence is based upon a 16-step phase cycling of the 2-step TPPM decoupling method for solids [J. Chem. Phys. 103, 6951 (1995)]. Since then, we have found that a stepwise variation of the phase angle in the TPPM sequence offers even better results. The application of this new method to a liquid crystalline compound, 4-n-pentyl-4'-cyanobiphenyl, and a solid, L-tyrosine hydrochloride, is reported. The reason for the improvement is explained by an analysis of the problem in the rotating frame. (C) 2000 Academic Press.