Spontaneous Mirror-Symmetry Breaking in Isotropic Liquid Phases of Photoisomerizable Achiral Molecules

被引：38

作者：

Alaasar, Mohamed ^{[1
,2
]}

Prehm, Marko ^{[1
]}

Cao, Yu ^{[3
]}

Liu, Feng ^{[3
]}

Tschierske, Carsten ^{[1
]}

机构：

[1] Univ Halle Wittenberg, Inst Chem, D-06120 Halle An Der Saale, Germany

[2] Cairo Univ, Fac Sci, Dept Chem, Giza, Egypt

[3] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 01期

基金：

中国国家自然科学基金;

关键词：

azo compounds; chirality; liquids; self-assembly; symmetry breaking; POLAR ORDER; CRYSTALLINE PHASE; NEMATIC PHASE; CHIRALITY; AMPLIFICATION; SEGREGATION; DERIVATIVES;

D O I：

10.1002/anie.201508097

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Spontaneous mirror-symmetry breaking is of fundamental importance in science as it contributes to the development of chiral superstructures and new materials and has a major impact on the discussion around the emergence of uniform chirality in biological systems. Herein we report chirality synchronization, leading to spontaneous chiral conglomerate formation in isotropic liquids of achiral and photoisomerizable azobenzene-based rod-like molecules. The position of fluorine substituents at the aromatic core is found to have a significant effect on the stability and the temperature range of these chiral liquids. Moreover, these liquid conglomerates occur in a new phase sequence adjacent to a 3D tetragonal mesophase.

引用

页码：312 / 316

页数：5

共 55 条

[1] A Liquid Crystalline Phase with Uniform Tilt, Local Polar Order and Capability of Symmetry Breaking [J].