Vibrational Spectroscopy of Liquid Crystals: IV. Infrared and Far Infrared Spectra of the MBBA and EBBA Liquid Crystals
- 1 January 1976
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 36 (3-4) , 327-336
- https://doi.org/10.1080/15421407608084336
Abstract
Infrared spectra have been recorded for N(p-methoxy) benzylidene- (p-n-butyl) aniline (MBBA) and its ethoxy analog in the crystalline, mesomorphic and isotropic phases. From the spectra obtained for a homeotropic layer in the nematic phase and for an isotropic layer, assignments of the bands are given which are supported by a previous normal coordinate analysis for benzylidene-aniline. Far infrared spectra have also been investigated for these compounds. The observed bands mostly consist of internal vibrations except the presence of a 120 cm−1 band assigned to a librational mode about the long axis of the molecule.Keywords
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