Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes Str. 2, 06120 Halle/Saale (Germany).
Department of Chemistry, Faculty of Science, Cairo University, P.O. 12613 Giza (Egypt).
Angew Chem Int Ed Engl. 2016 Jan 4;55(1):312-6. doi: 10.1002/anie.201508097. Epub 2015 Oct 22.
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.
自发镜像对称破缺在科学中具有重要意义，因为它有助于手性超结构和新材料的发展，并对讨论生物系统中均匀手性的出现产生重大影响。在此，我们报告了手性同步，导致非手性和光致异构化的偶氮苯棒状分子各向同性液体中自发手性凝聚体的形成。在芳核上引入氟取代基对这些手性液体的稳定性和温度范围有显著影响。此外，这些液相凝聚体出现在与 3D 四方介相相邻的新相序列中。
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