Abstract
The far infrared spectra of some alkyl-cyano-biphenyl compounds and cyclo-hexane derivatives are presented in liquid, nematic and smectic A phases; they are interpreted in terms of intra and intermolecular modes. Dichroism measurements performed with an optically pumped F.I.R. waveguide laser are also given. The conditions for deducing the order parameter P2 of nematic compounds from dichroism measurements in the F.I.R. range are studied with the aid of recent theoretical developments of absorption spectrometry based on orientational and vibrational correlation function formalism.
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© 1980 Springer-Verlag Berlin Heidelberg
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Decoster, D., Bouamra, M. (1980). Use of the Far Infrared Spectroscopy for the Determination of the Order Parameter of Nematic Compounds. In: Helfrich, W., Heppke, G. (eds) Liquid Crystals of One- and Two-Dimensional Order. Springer Series in Chemical Physics, vol 11. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-67848-6_20
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DOI: https://doi.org/10.1007/978-3-642-67848-6_20
Publisher Name: Springer, Berlin, Heidelberg
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