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Gearing of Molecular Swirls: Columnar Packing of Nematogenic Hexakis(4‐alkoxyphenylethynyl)benzene Derivatives
Author(s) -
Lee ShernLong,
Lin HsingAn,
Lin YiHui,
Chen HsiuHui,
Liao ChingTing,
Lin TzuLing,
Chu YiChen,
Hsu HsiuFu,
Chen Chunhsien,
Lee JeyJau,
Hung WenYi,
Liu QuYuan,
Wu Chunhung
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201002975
Subject(s) - alkoxy group , benzene , materials science , liquid crystal , crystallography , molecule , liquid crystalline , close packing of equal spheres , chemistry , organic chemistry , alkyl , optoelectronics
Through molecular design and straightforward synthesis, incorporating an additional alkoxy chain onto various numbers of peripheral phenyls in nematogenic hexakis(4‐alkoxyphenylethynyl)benzene was achieved to generate columnar phases with significantly expanded temperature ranges. For the compound with two decyloxy chains on every peripheral phenyl, scanning tunnelling microscopic studies indicate the molecule adopts a preferred molecular‐swirl geometry by restricting the conformational arrangement of the alkoxy side chains. Cooperative packing of the molecular swirls by a lock‐in mechanism among columns results in a stable helical column packing evidenced by powder X‐ray diffraction.