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One-dimensional pulse technique for detection of quaternary carbons

✍ Scribed by G. A. Nagana Gowda

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
117 KB
Volume
39
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

A one‐dimensional pulse scheme employing pulsed field gradients for detecting only quaternary carbons is reported. This new scheme, referred to as PFG‐QCD (pulsed field gradient quaternary carbon detection), suppresses primary, secondary and tertiary (CH~3~, CH~2~ and CH) carbons very efficiently by creating their antiphase magnetization and then either dephasing the antiphase magnetization using pulsed field gradients or by the introduction of proton decoupling to the antiphase carbon magnetization. The experimental results of the new technique also demonstrate that mis‐setting of the parameters such as the τ delay and the pulse widths does not appreciably degrade the quality of the resultant spectrum. The proposed method provides spectra which are superior, in terms of suppression of unwanted protonated carbon signals, to the other editing methods and thus provides a useful alternative technique for routine applications. Copyright © 2001 John Wiley & Sons, Ltd.

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