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An Efficient Broadband Decoupling Sequence for Liquid Crystals

โœ Scribed by Youlu Yu; B.M. Fung

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
126 KB
Volume
130
Category
Article
ISSN
1090-7807

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โœฆ Synopsis

A new and efficient broadband decoupling sequence is presented. It is based on the phase cycling of two pulses with small phase angles. The pulse width is 180 degrees +/- 30 degrees, and the phase angle is +/-10 degrees-12 degrees. The sequence contains 16 elements, and is called SPARC-16 as an abbreviation for small phase angle rapid cycling. The application of this sequence to a liquid crystalline compound, 4-n-pentyl-4'-cyanobiphenyl (5CB), is reported. The signal-to-noise ratios and the linewidths of the 13C peaks of 5CB with SPARC-16 decoupling and with other decoupling methods are compared. The results show that the broadband decoupling efficiency of SPARC-16 is considerably better than those of other methods.

๐Ÿ“œ SIMILAR VOLUMES

An Improved Broadband Decoupling Sequenc
An Improved Broadband Decoupling Sequence for Liquid Crystals and Solids
โœ B.M. Fung; A.K. Khitrin; Konstantin Ermolaev ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 88 KB

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