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Bent Molecules with a 60° Central Core Angle that Form B7 and B2 Phases
Author(s) -
Lee EunWoo,
Takimoto Koji,
Tokita Masatoshi,
Watanabe Junji,
Kang Sungmin
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201403762
Subject(s) - antiferroelectricity , bent molecular geometry , molecule , ferroelectricity , chirality (physics) , crystallography , liquid crystal , materials science , polar , phase (matter) , core (optical fiber) , polarization (electrochemistry) , chemistry , organic chemistry , composite material , physics , optoelectronics , chiral symmetry breaking , quantum mechanics , astronomy , dielectric , nambu–jona lasinio model , quark
Small‐angle bent‐core liquid‐crystalline (LC) molecules based on a 1,2‐bis(phenylethynyl)benzene central core have been synthesized that form banana smectic phases with a ferroelectric B7–antiferroelectric B2 phase sequence upon cooling. The formation of polar, switchable ferro‐/antiferroelectric banana phases indicates that, despite the low core bend angle of approximately 60°, banana smectic phases are still formed with the bend direction parallel to the layer. This study offers significant evidence that shows bent‐core molecules with a 60° bend angle can form the well‐known B2 and B7 banana phases. Consequently, it may lead to the preparation of a wide variety of novel bent molecules with low bend angles that spontaneously form an LC phase with both polarization and chirality.