Liquid crystalline model compounds based on 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA)
作者:
Petra Eiselt,
Steffen Denzinger,
Hans-Werner Schmidt,
期刊:
Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 18,
issue 2
页码: 257-262
ISSN:0267-8292
年代: 1995
DOI:10.1080/02678299508036621
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
3,3′,4,4′-Biphenyltetracarboxylic dianhydride (BPDA) was investigated as the central core unit in mesogenic molecules. Of particular interest was whether the BPDA unit could be self-constrained into atrans-conformation, and thus organize into a liquid crystalline phase. Two homologous series of symmetrical substituted model compounds, 3,3′,4,4′-biphenyltetracarboxy-N-N'-bis-(4-n-alkylphenyl) diimides and 3,3′,4,4′-biphenyltetracarboxy-N-N'-bis-(4-n-alkoxyphenyl)diimides were synthesized. For both series high temperature smectic A phases were observed. To our knowledge these are the first examples of liquid crystalline behaviour observed with BPDA as the mesogenic core.
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