An adaptable NMR broadband decoupling scheme

✍ Scribed by Eriks Kupče; Ray Freeman

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 412 KB
• Volume: 250
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00042-5

✦ Synopsis

A broadband hetemnuclear decoupling scheme for high resolution liquid phase NMR spectroscopy is described, based on adiabatic fast passage with a linear frequency sweep. It is shown that the flexible choice of shaping function for the radiofrequency amplitude profile allows the method to be adapted to fit a wide range of sample parameters and experimental conditions. The practical limitations on phase cycling are emphasized. Expressions are derived t~ guide the choice of operating parameters so as to achieve a large effective bandwidth, low radiofrequency power dissipation, or weak cycling sidebands in the decoupled spectrum.