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  • Title: Two-dimensional J-spectra with absorption-mode lineshapes.
    Author: Pell AJ, Keeler J.
    Journal: J Magn Reson; 2007 Dec; 189(2):293-9. PubMed ID: 17900950.
    Abstract:
    Two-dimensional J-spectroscopy offers the possibility of a complete separation of chemical shifts and J-couplings. However, the usefulness of the experiment is considerably reduced by the fact that peaks in the spectra have the phase-twist lineshape. We present a simple new spectroscopic method for recording J-spectra in which the peaks are both in the absorption mode and retain their natural intensities, albeit at the cost of a considerable reduction in the signal-to-noise ratio. No special data-processing is required. The method is tested on quinine, and the steroid dehydroisoandrosterone.
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