Coherence Sidebands in Adiabatic Decoupling

✍ Scribed by M.Robin Bendall; Thomas E. Skinner

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 154 KB
• Volume: 129
• Category: Article
• ISSN: 1090-7807
• DOI: 10.1006/jmre.1997.1254

✦ Synopsis

RF pulse sequences applied to IS spin systems may produce decoupling scheme (4), recently introduced as a method for substantial transverse antiphase S magnetization coupled to anticanceling ordinary sidebands resulting from in-phase magnephase I magnetization, just prior to detection of the S signal, for tization, is also a signal-averaging technique that has been samples containing a range of J coupling constants, or when pulse demonstrated to be effective on or near resonance and might sequence delays are misset from ideal values. This magnetization be more generally applicable. For now, we will emphasize is generally considered to be unobservable. Adiabatic decoupling methods that eliminate coherence sidebands in a single tranon the I spins during signal detection efficiently converts this magsient over bandwidths appropriate to modern broadband denetization to observable S signal in the form of sidebands which we coupling.

dub ''coherence sidebands.'' Three single-transient pulsed-field-

The importance of eliminating antiphase responses in cergradient methods are described for eliminating these unwanted tain circumstances is well known. Pegg et al. (5) described sidebands. The techniques are applicable to 1 H-detected 13 C-decoupled experiments on spectrometers operating at a 1 H frequency of the use of short bursts of noise decoupling to randomize up to 2 GHz.