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
This publication has 14 references indexed in Scilit:
- Deuterium NMR study of molecular order and reorientation in the nematic phase of p-methoxy-d3-benzylidene-d1-p-n-butyl-d9-anilineThe Journal of Chemical Physics, 1978
- Deuteron line shape study of molecular order and conformation in the nematogens PAA and MBBAThe Journal of Chemical Physics, 1977
- Deuterium relaxation of chloroform dissolved in a nematic liquid crystalThe Journal of Chemical Physics, 1977
- Uncoupling of local field spectra in nuclear magnetic resonance: determination of atomic positions in solids.Proceedings of the National Academy of Sciences, 1976
- Crystal structure analysis of the nematogenic compound 2,2'-dibromo-4,4'-bis-(p-methoxybenzylideneamino)biphenylActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1975
- Niveaux de 137Cs alimentés dans la désintégration de 137XeJournal de Physique, 1975
- Study of the isotropic-nematic-solid transitions in a liquid crystal by carbon-13—proton double resonancePhysical Review A, 1974
- Proton-enhanced NMR of dilute spins in solidsThe Journal of Chemical Physics, 1973
- Conformational studies. Part III. Crystal and molecular structures of N-(2,4-dichlorobenzylidene)anilineJournal of the Chemical Society, Perkin Transactions 2, 1972
- Nuclear Resonance Absorption in Hydrated Crystals: Fine Structure of the Proton LineThe Journal of Chemical Physics, 1948