Mesomorphic behaviour of 1, 3-phenylene bis[4-(4-alkoxyphenyliminomethyl)benzoates] and related compounds

T. Akutagawa, Y. Matsunaga, K. Yasuhara

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99 Citations (Scopus)

Abstract

DSC and X-ray diffraction studies on a series of 1,3-phenylene bis[4-(4-alkoxyphenyliminomethyl)benzoates] are presented. The only mesophase exhibited by the methoxy to hexadecyloxy homologues is of the smectic C type. The reversal of the iminomethyl linkage reduces drastically the incidence of a mesophase; that is, only the first five homologous members exhibit a smectic C phase in the series of 1,3-phenylene bis[4-(4-alkoxybenzylideneamino)benzoates]. Almost all the members in the second series become nematogenic by the chloro substitution at the 4-position of the 1,3-phenylene moiety. In addition, a smectic C phase is observable for the ethoxy to pentyloxy and also the tetradecyloxy and hexadecyloxy members. The second chloro-substituent introduced to the 6-position of the same central ring eliminates completely the smectic C phase and enhances the nematic thermal stability.

Original languageEnglish
Pages (from-to)659-666
Number of pages8
JournalLiquid Crystals
Volume17
Issue number5
DOIs
Publication statusPublished - 1994 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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