NDLI: A toolbox of HSQC experiments for small molecules at high $^{13}C-enrichment.$ Artifact-free, fully $^{13}C-homodecoupled$ and $J_{CC}-encoding$ pulse sequences

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A toolbox of HSQC experiments for small molecules at high $^{13}C-enrichment.$ Artifact-free, fully $^{13}C-homodecoupled$ and $J_{CC}-encoding$ pulse sequences

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Foroozandeh, Mohammadali Giraudeau, Patrick Jeannerat, Damien
Description	Country affiliation: Switzerland Author Affiliation: Foroozandeh M ( Department of Organic Chemistry, University of Geneva, 30 Quai E. Ansermet, 1211, Geneva 4, Switzerland.)
Abstract	A set of modified HSQC experiments designed for the study of $^{13}C-enriched$ small molecules is introduced. It includes an improved sensitivity-enhanced HSQC experiment eliminating signal artifacts because of high-order $^{13}C$ magnetization terms generated at high $^{13}C$ enrichment. A broadband homonuclear $^{13}C$ decoupling sequence based on Zangger and Sterk's method simplifies the complex $^{13}C–^{13}C$ multiplet structure in the F1 dimension of HSQC. When recording spectra at high resolution, the combination with a multiple-site modulation of the selective pulse outperforms the constant-time HSQC in terms of sensitivity and reliability. Finally, two pulse sequences reintroducing selected $J_{CC}$ couplings with selective pulses facilitate their assignments and measurements either in the splitting of the resulting doublets or by modulation of the signal amplitude. A sample of uniformly 92% $^{13}C-enriched$ cholesterol is used as an example. Copyright © 2013 John Wiley & Sons, Ltd.
File Format	HTM / HTML
ISSN	07491581
Issue Number	12
Journal	Magnetic Resonance in Chemistry
Volume Number	51
e-ISSN	1097458X
Language	English
Publisher	Wiley Heyden
Publisher Date	2013-12-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Chemistry Cholesterol Chemistry Carbon Isotopes Magnetic Resonance Spectroscopy Standards Molecular Structure Reference Standards Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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