Bulletin of the Chemical Society of Japan p. 3571 - 3577 (1983)
Update date:2022-08-11
Topics:
Nakai
Takenaka
Kusabayashi
In order to examine the liquid crystalline properties of coumarin, 3-X- and 7-Y-substituted coumarins where X equals cyano and n-alkoxycarbonyl, and Y equals 4-n-alkyl- and 4-n-alkoxybenzoyl, 4-alkoxycinnamoyloxy, 4 prime -alkyl- and 4 prime -alkoxy-4-biphenylylcarbonyloxy, and 4-(4-alkoxybenzoyloxy)benzoyloxy groups have been prepared. The compounds with X equals alkoxycarbonyl groups tend to exhibit strong smectic properties, and compounds with X equals cyano exhibit stable nematic phases, whereas the coumarin core seems to facilitate a lateral separation of molecules in the mesophase due to its large molecular breadth. The thermal properties are discussed in terms of the polarity and polarizability of coumarin, and the molecular structure.
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