J-coupling Spectra in Zero Magnetic Field (IMAGE)
Caption
A molecule of parahydrogen hydrogenates a styrene molecule to form ethylbenzene. J-coupling reveals the position and orientation of the hydrogen atoms and the carbon-13 atoms to which they bond. The upper panel shows a simulated spectrum, in blue, of coupling between a hydrogen and a carbon in the methyl position. The actual experimental data are in white. The lower panel shows simulation of coupling in the methylene position, in green, with actual data in white. Simulation and experiment are in close agreement, indicating the promise of the zero-field technique for chemical fingerprinting.
Credit
Pines and Budker groups, Lawrence Berkeley National Laboratory
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