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Updated: May 14, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
High-resolution zero-field NMR J-spectroscopy of aromatic compounds
John W Blanchard1, Micah P Ledbetter, Thomas Theis
1Department of Chemistry, University of California at Berkeley, Berkeley, California 94720-3220, United States. jwblanchard@berkeley.edu
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.
Related Concept Videos
NMR Spectroscopy of Aromatic Compounds
NMR Spectroscopy of Benzene Derivatives
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
2D NMR: Homonuclear Correlation Spectroscopy (COSY)
2D NMR: Overview of Heteronuclear Correlation Techniques

