Controlling spontaneous chirality in achiral materials: liquid crystal oligomers and the heliconical twist-bend nematic phase

被引：28

作者：

Majewska, M. M. ^{[1
]}

Forsyth, E. ^{[2
]}

Pociecha, D. ^{[1
]}

Wang, C. ^{[3
]}

Storey, J. M. D. ^{[2
]}

Imrie, C. T. ^{[2
]}

Gorecka, E. ^{[1
]}

机构：

[1] Univ Warsaw, Fac Chem, Ul Zwirki & Wigury 101, PL-02089 Warsaw, Poland

[2] Univ Aberdeen, Sch Nat & Comp Sci, Dept Chem, Meston Bldg, Aberdeen AB24 3UE, Scotland

[3] LBNL, Adv Light Source, Berkeley, CA 94720 USA

来源：

CHEMICAL COMMUNICATIONS | 2022年 / 58卷 / 34期

关键词：

SYMMETRY-BREAKING; TRIMERS; DIMERS;

D O I：

10.1039/d1cc07012f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Liquid crystal oligomers, namely dimers, trimers and tetramers, consisting of cyanobiphenyl and benzylideneaniline-based mesogenic units connected by either linear or bent alkoxy or alkyl spacers are reported. These materials, although built from achiral molecules, show the spontaneously chiral heliconical twist-bend nematic (N-TB) phase. We report the relationships between the shape of the oligomer, and the N-TB phase stability, the temperature dependence of the helical pitch length and tilt angle, birefringence, and elastic constants.

引用

页码：5285 / 5288

页数：4

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