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

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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 t1 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.

Document Type: Miscellaneous

Affiliations: 1: Laboratoire de Pharmacognosie, UPRES-A 6013, Moulin de le Housse, Reims Cedex 2, 51097, France 2: Laboratoire de Fractionnement Enzymatique, Institut National de la Recherche Agronomique, Moulin de la Housse, Reims Cedex 2, 51687, France

Publication date: August 1, 1999

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