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Intrinsic chiral domains enantioselectively segregated from twisted nematic cells of bent‐core mesogens
Author(s) -
Choi SukWon,
Kang Sungmin,
Takanishi Yoichi,
Ishikawa Ken,
Watanabe Junji,
Takezoe Hideo
Publication year - 2007
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.20358
Subject(s) - liquid crystal , chemistry , bent molecular geometry , chirality (physics) , phase (matter) , crystallography , core (optical fiber) , molecule , enantioselective synthesis , stereochemistry , organic chemistry , condensed matter physics , optics , chiral symmetry , catalysis , physics , quantum mechanics , quark , nambu–jona lasinio model
Enantioselective segregation has been attained in the Bx phase of a novel substituted oxadiazole achiral banana‐shaped liquid crystal (LC) without introducing any chiral species. This bent‐core molecule exhibits LC polymorphism; the higher temperature nematic (N) phase and the lower temperature banana smectic phase (Bx phase), in which spontaneous chiral segregation with (+) and (−) chiral domains occurs with equal probabilities. In twisted cell geometries, extrinsically induced twisted N structures are formed and result in intrinsically chiral conglomorate when the temperature is decreased from N to Bx. The observed optical activity in homochiral Bx phase is comparable to those theoretically predicted and is proportional to the cell thickness. Chirality, 2007. © 2007 Wiley‐Liss, Inc.
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