Optimizing Delays in the MBOB, Broadband HMBC, and Broadband XLOC NMR Pulse Sequences

✍ Scribed by Thomas Schulte-Herbrüggen; Axel Meissner; Alexandra Papanikos; Morten Meldal; Ole Winneche Sørensen

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 445 KB
• Volume: 156
• Category: Article
• ISSN: 1090-7807
• DOI: 10.1006/jmre.2002.2565

✦ Synopsis

The MBOB, broadband HMBC, and broadband XLOC NMR pulse sequences (A. Meissner and O. W. Sørensen (2000, Magn. Reson. Chem. 38, 981-984; 2001, 39, 49-52)) were introduced as a means of obtaining heteronuclear long-range correlation spectra with broadband excitation over an interval of heteronuclear long-range J coupling constants. However, it is not trivial what combination of delays to choose for a given purpose, particularly if one-bond and long-range correlation spectra are obtained simultaneously as in MBOB. This paper presents a way to determine sets of delays for MBOB, broadband HMBC, and broadband XLOC resolving the problem. The results tabulated suit various ranges of J coupling constants and transverse relaxation times.