Study on ultra-low-field nuclear magnetic resonance spectroscopy based on high-sensitivity atomic magnetometer

doi:10.3969/j.issn.0253-2778.2020.08.014

Abstract

Abstract: The frequency of the spectral line and the splitting rule under the ultra-low magnetic field were theoretically given. Then, using the home-built ultra-low-field NMR spectrometer based on a high-sensitivity atomic magnetometer, an experimental study on ultra-low-field NMR spectroscopy was carried out. Taking a typical AXn-type organic molecule as an example, the J-coupling spectra under zero magnetic field was measured and the J-coupling parameters were accurately obtained by combining a theoretical analysis in a variety of organic molecules. For chemical samples with the same spectral structure under zero magnetic field, by applying a weak static magnetic field (nT) to the samples, it was observed that different samples have a unique ultra-low field NMR spectral splitting, which can be used as the "fingerprinting" of the sample to identify them.

Key words: ultra-low-field NMR, J-coupling spectrum, atomic magnetometer

CLC Number:

O482.53+2

XU Wenjie, JIANG Min, PENG Xinhua. Study on ultra-low-field nuclear magnetic resonance spectroscopy based on high-sensitivity atomic magnetometer[J]. Journal of University of Science and Technology of China, 2020, 50(8): 1138-1143.

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