Odd-even behavior of ferroelectricity and antiferroelectricity in two homologous series of bent-core mesogens

Seng Kue Lee, Sung Heo, Jong Gun Lee, Kyung Tae Kang, Kazuya Kumazawa, Koushi Nishida, Yoshio Shimbo, Yoichi Takanishi, Junji Watanabe, Takayuki Doi, Takashi Takahashi, Hideo Takezoe

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


Two chiral bent-core mesogens Pn-O-PIMB(n- 2)* (n= 9 and 10) and their oxygen analogues Pn-O-PIMB(n - 2)*-(n - 4)O (n = 8, 9, and 10) with ω-[(S)-amyloxy]alkoxy terminal groups were prepared, and their phase structures were investigated by means of electro-optic, polarization reversal current and second harmonic generation measurements in order to clarify the effect of the interlayer steric interaction on the emergence of polar orderings. The odd-even behavior for the alternative appearance of ferroelectricity and antiferroelectricity was observed in two homologous series; the bent-core mesogens P10-O-PIMB8*, P8-O-PIMB6*-4O, and P10-O-PIMB8*-6O in addition to the previously reported P6-O-PIMB4* and P8-O-PIMB6*, where the length of chains n is even, exhibited ferroelectric phases. On the contrary, the mesogens P7-O-PIMB5*, P9-O-PIMB7*, and P9-O-PIMB7*-5O, where n is odd, showed antiferroelectric phases. It is obvious that the interlayer steric interaction plays a major role for the emergence of a variety of phase structures.

Original languageEnglish
Pages (from-to)11085-11091
Number of pages7
JournalJournal of the American Chemical Society
Issue number31
Publication statusPublished - 2005 Aug 10
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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