Dipole-coupled carbon-13 spectra, a source of structural information on liquid crystals
- 1 September 1979
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 38 (3), 909-922
- https://doi.org/10.1080/00268977900102131
Abstract
It is shown that the introduction of well-selected dipolar interactions into carbon-13 spin systems of liquid crystals can lead to well-resolved spectra with a rich content of structural information. Two possibilities are investigated: (a) selective isotope substitution, in particular by deuterium and nitrogen-15, and simultaneous proton decoupling; (b) two-dimensional separated local field carbon-13 spectroscopy. The methods are demonstrated by investigations of benzylidene anilines in their nematic phases.Keywords
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