One-dimensional pulse technique for detection of quaternary carbons

Gowda, Nagana GA (2001) One-dimensional pulse technique for detection of quaternary carbons. In: Magnetic Resonance in Chemistry, 39 (10). pp. 581-585.

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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 r 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.

Item Type:	Journal Article
Publication:	Magnetic Resonance in Chemistry
Publisher:	John Wiley & Sons, Ltd.
Additional Information:	The copyright belongs to John Wiley & Sons, Ltd.
Keywords:	nmr;13c nmr;quaternary carbons;spectral editing;gradient pulse sequence
Department/Centre:	Division of Chemical Sciences > Sophisticated Instruments Facility (Continued as NMR Research Centre)
Date Deposited:	11 Jan 2007
Last Modified:	19 Sep 2010 04:24
URI:	http://eprints.iisc.ac.in/id/eprint/5607

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