Preparation and mesomorphic properties of a homologous series of N,N'-(2-chloroterephthalylidene)bis(4-n-alkylaniline)s
A series of N,N'-(2-chloroterephthalylidene)bis(4-n-alkylaniline)s (CTBAAs) were prepared and their mesomorphic behaviour characterized. None of the homologues showed smectic behaviour, but nematic behaviour with broad mesophases and rather low melting points was seen. The mesomorphic behaviour...
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Published in | Liquid crystals Vol. 24; no. 4; pp. 543 - 548 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Taylor & Francis Group
01.04.1998
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Online Access | Get full text |
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Summary: | A series of N,N'-(2-chloroterephthalylidene)bis(4-n-alkylaniline)s (CTBAAs) were prepared and their mesomorphic behaviour characterized. None of the homologues showed smectic behaviour, but nematic behaviour with broad mesophases and rather low melting points was seen. The mesomorphic behaviour was compared with that of N,N'-(terephthalylidene) -bis(4-n-alkylaniline)s (TBAAs) and 4,4-bis-(n-alkylbenzal)-2-chloro-1,4-phenylenediamines (BACPDs). An X-ray diffraction analysis of N,N'-(2-chloro-terephthal)bis(4-n-butylaniline) (CTBBA) showed that the molecules were packed in crystals forming a staggered arrangement called an 'imbricated structure'. |
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ISSN: | 0267-8292 1366-5855 |
DOI: | 10.1080/026782998207000 |