Optimizing delays in the MBOB, broadband HMBC, and broadband XLOC NMR pulse sequences.
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.
Schulte-Herbrüggen
Thomas
T
Department of Chemistry, Carlsberg Laboratory, Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark.
Meissner
Axel
A
Papanikos
Alexandra
A
Meldal
Morten
M
Sørensen
Ole Winneche
OW