期刊
CHEMICAL PHYSICS LETTERS
卷 440, 期 4-6, 页码 308-312出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2007.03.096
关键词
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The drawback of nuclear magnetic resonance (NMR) spectroscopy at ultra-low magnetic fields appears to be the lack of access to chemical information in terms of chemical shifts and homo-nuclear J-couplings. Here we report that a chemical group can be identified by the multiplet structure of the NMR spectrum in ultra-low fields if the condition of the strong hetero-nuclear J-coupling is fulfilled. Moreover we found that high-resolution ultra-low field proton-NMR spectra of liquids indeed reveal all hetero- and homo-nuclear J-couplings in terms of pairs of multiplets. This opens the door for the study of molecular structures at ultra-low magnetic fields. (c) 2007 Elsevier B.V. All rights reserved.
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