Fourier transform infrared study of two truxene-based discotic liquid crystals
- 1 December 1990
- journal article
- research article
- Published by Taylor & Francis in Liquid Crystals
- Vol. 8 (6) , 839-850
- https://doi.org/10.1080/02678299008047394
Abstract
We have used FTIR absorption to study the crystalline and liquid-crystalline phases of 2,3,7,8,12,13-hexa-n-tetradecanoyloxy-truxene (HATX) and 2,3,7,8,12,13-hexa(4-n-undecyloxybenzoyloxy)truxene (HBTX). Both materials show pronounced changes in the CH2 stretching mode frequencies at their melting points. In addition, HATX shows a transition at about 20°C below the nominal melting point in which the alkyl tails gain significant disorder. Benzene stretching modes and the CH2 deformation modes show subtle changes at the Drd → N transition of HBTX and at the Drd → Dhd transition of HATX.Keywords
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