Share Email Print
cover

Proceedings Paper

Bent LC molecules with a 60° central core that can form B7 and B2 phases (Presentation Recording)
Author(s): Junji Watanabe

Paper Abstract

We synthesized small-angle bent-core liquid-crystalline (LC) molecules based on a 1,2-bis(phenylethylene) benzene central core, containing seven aromatic rings and alkoxy tails with carbon numbers of 12, 16 and 18. This ortho-bistolane central core offers a 60° bend angle. Irrespective of this unusually small angle, these molecules can form banana smectic phases with a ferroelectric B7-antiferroelectric B2 phase sequence upon cooling as clarified from the micoscopic, X-ray and opto-electric observations. This indicates that despite of the low bend angle of 60°, these are able to be still packed into a layer with the polar bent direction parallel to the layer like ordinal banana molecules. The present result is striking since it had been believed that banana phases can only be stabilized when the bending angle is in the range from 110-140°, providing additional insight into the nature of banana-shaped molecules.

Paper Details

Date Published: 5 October 2015
PDF: 1 pages
Proc. SPIE 9565, Liquid Crystals XIX, 95650Q (5 October 2015); doi: 10.1117/12.2187155
Show Author Affiliations
Junji Watanabe, Tokyo Institute of Technology (Japan)


Published in SPIE Proceedings Vol. 9565:
Liquid Crystals XIX
Iam Choon Khoo, Editor(s)

© SPIE. Terms of Use
Back to Top