Gearing of Molecular Swirls: Columnar Packing of Nematogenic Hexakis(4-alkoxyphenylethynyl)benzene Derivatives

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Title:	Gearing of Molecular Swirls: Columnar Packing of Nematogenic Hexakis(4-alkoxyphenylethynyl)benzene Derivatives
Authors:	Lee, Shern-long;Lin, Hsing-an;Lin, Yi-hui;Chen, Hsiu-hui;Liao, Ching-ting;Lin, Tzu-ling;Chu, Yi-chen;Hsu, Hsiu-fu;Chen, Chun-hsien;Lee, Jey-jau;Hung, Wen-yi;Liu, Qu-yuan;Wu, Chunhung
Contributors:	淡江大學化學學系
Keywords:	columnar suprastructures;helical structures;liquid crystals;molecular swirls;scanning tunnelling microscopy
Date:	2011-01-17
Issue Date:	2012-06-14 09:06:56 (UTC+8)
Publisher:	Weinheim: Wiley - V C H Verlag GmbH & Co. KGaA
Abstract:	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.
Relation:	Chemistry-A European Journal 17(3), pp.792-799
DOI:	10.1002/chem.201002975
Appears in Collections:	[Graduate Institute & Department of Chemistry] Journal Article

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