期刊
JOURNAL OF MAGNETIC RESONANCE
卷 142, 期 1, 页码 97-101出版社
ACADEMIC PRESS INC
DOI: 10.1006/jmre.1999.1896
关键词
broadband decoupling; liquid crystals; SPINAL-64
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.
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