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Band-Selective HSQC and HMBC Experiments Using Excitation Sculpting and PFGSE

โœ Scribed by Christine Gaillet; Christelle Lequart; Philippe Debeire; Jean-Marc Nuzillard

Book ID
102599280
Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
232 KB
Volume
139
Category
Article
ISSN
1090-7807

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โœฆ Synopsis

Variants of the HSQC and HMBC experiments are described. They allow the restriction of the heteronuclear chemical shift domain without causing spectral folding. Selectivity is introduced in the HSQC experiment by means of excitation sculpting. The selective element of the pulse sequence is a double pulsed field gradient spin echo. It may be used either split by the t(1) evolution period, or not. The selectivity profile depends on the scheme used as well as on the number of protons attached to the heteronucleus. The selective HMBC experiment requires only a single echo sequence as no strict control of the signal phase is required. A complex glycoconjugate is used as a test compound for the new pulse sequences.

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## Abstract The DANTEโ€Z pulse train [(ฮธ)~x~โ€ฯ„โ€(ฮธ)~__x__~โ€ฯ„]~__n__~ (ฯ€/2) (Acq)~ยฑ~, applied to solidโ€state samples in an asynchronous manner with respect to the rotor period of the magicโ€angle spinning, is able to extract the spectrum of a single CSA (chemical shift anisotropy) sideโ€band family with