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  • Title: High-resolution zero-field NMR J-spectroscopy of aromatic compounds.
    Author: Blanchard JW, Ledbetter MP, Theis T, Butler MC, Budker D, Pines A.
    Journal: J Am Chem Soc; 2013 Mar 06; 135(9):3607-12. PubMed ID: 23391037.
    Abstract:
    We report the acquisition and interpretation of nuclear magnetic resonance (NMR) J-spectra at zero magnetic field for a series of benzene derivatives, demonstrating the analytical capabilities of zero-field NMR. The zeroth-order spectral patterns do not overlap, which allows for straightforward determination of the spin interactions of substituent functional groups. Higher-order effects cause additional line splittings, revealing additional molecular information. We demonstrate resonance linewidths as narrow as 11 mHz, permitting resolution of minute frequency differences and precise determination of long-range J-couplings. The measurement of J-couplings with the high precision offered by zero-field NMR may allow further refinements in the determination of molecular structure and conformation.
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