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	Tuning Mesomorphic Properties and Handedness of Chiral Calamitic Liquid Crystals by Minimal Modification of the Effective Core
	Liu, Anhua ; Sun, Qiming ; Cui, Jiaxi ; Zheng, Jia ; Liu, Wenjian ; Wan, Xinhua
	2011
关键词	cholesteric phase twist grain boundary C* phase handedness rotational isomer molecular modeling HELICAL TWIST SENSE SPONTANEOUS POLARIZATION DIRECTION ALPHA-HELIX NEMATIC PHASE INVERSION DOPANTS CONFIGURATIONS DERIVATIVES DEPENDENCE INDUCTION
英文摘要	Two pairs of calamitic liquid crystalline molecules, (1)-2-[4'-(S)-sec-butoxyphenyl]- 5-(4'-hexoxyphenyl) toluene ((1)-S-1) and (1)-2-(4'-hexoxyphenyl)-5-[4'-(S)-sec-butoxyphenyl] toluene ((1)-S-2), (2)-2-[4'-(R)-sec-butoxyphenyl]-5-(4'-hexoxyphenyl) toluene ((2)-R-1) and (2)-2-(4'-hexoxyphenyl)-5-[4'-(R)-sec-butoxyphenyl] toluene ((2)-R-2), have been designed and synthesized. Each of the molecules consists of a p-terphenyl core substituted with a methyl group on the middle ring, a chiral sec-butoxy tail, and an achiral n-hexoxy tail. The geometrical difference between (1)-S-1 ((2)-R-1) and (1)-S-2 ((2)-R-2) lies only in the location of the methyl group on the effective mesogenic core. Yet, such a small change in the structure gives rise to remarkable differences in mesogenic properties and handedness. Both (1)-S-1 and (2)R- 1 have an enantiotropic cholesteric phase (N*) and a monotropic twist grain boundary C* phase (TGBC*), whereas (1)-S-2 and (2)-R-2 exhibit only a monotropic N* phase. Moreover, (1)-S-1 ((2)-R-1) and (1)-S-2 ((2)-R-2) have opposite handedness in the N* phase, and (1)S- 1 and (2)-R-1 even have a helical inversion from N* to TGBC* phase through a non-helical chiral mesophase. Chirality 23: E74-E83, 2011. (C) 2011 Wiley Periodicals, Inc.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000309074200012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Medicinal; Chemistry, Analytical; Chemistry, Organic; Pharmacology & Pharmacy; SCI(E); CPCI-S(ISTP); PubMed; 2
语种	英语
DOI标识	10.1002/chir.21002
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/149976]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Liu, Anhua,Sun, Qiming,Cui, Jiaxi,et al. Tuning Mesomorphic Properties and Handedness of Chiral Calamitic Liquid Crystals by Minimal Modification of the Effective Core. 2011-01-01.

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