The N,N'-bis[4-(4-n-alkyloxybenzoyloxy)benzylidene]phenylene-1,3-diamines: mesophase behaviour and physical properties

A homologous series of banana-shaped compounds (n =1-12) is described. The short-chain derivatives exhibit a B 6 phase, while B 6 /B 1 dimorphism is found for the pentyloxy and hexyloxy homologues. The B 1 phase of the compounds having longer alkyloxy chains is changed to a B 2 phase for the compoun...

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Bibliographic Details
Published in:Liquid crystals 2001-11, Vol.28 (11), p.1603-1609
Main Authors: Weissflog, W., Wirth, I., Diele, S., Pelzl, G., Schmalfuss, H., Schoss, T., Würflinger, A.
Format: Article
Language:English
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Summary:A homologous series of banana-shaped compounds (n =1-12) is described. The short-chain derivatives exhibit a B 6 phase, while B 6 /B 1 dimorphism is found for the pentyloxy and hexyloxy homologues. The B 1 phase of the compounds having longer alkyloxy chains is changed to a B 2 phase for the compounds with n =11 and 12. The phase characterization was performed using their optical textures and by means of X-ray investigations. Transition enthalpies were measured using DSC. In addition, density measurements were performed on one selected homologue. The compound n =8 exhibiting a B 1 phase was investigated also by high-pressure DTA.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678290110075075