Controlling spontaneous mirror symmetry breaking in cubic liquid crystalline phases by the cycloaliphatic ring size
作者:Tino Reppe、Christian Dressel、Silvio Poppe、Carsten Tschierske
DOI:10.1039/c9cc09206d
日期:——
Rod-like molecules combining a fork-like triple chain end and a cycloaliphatic apex are introduced as a new design concept for materials with broad ranges of bicontinuous cubic (Cubbi) phases. By ring expansion from n = 4 to 12 a sequence of three Cubbi phases is observed; the achiral double gyroid la3[combining macron]d phase, a chiral "Im3m" phase and an achiral re-entrant la3[combining macron]d
结合了叉状三链末端和脂环族顶点的杆状分子被引入作为具有广泛范围的双连续立方(Cubbi)相的材料的新设计理念。通过从n = 4到12的环扩展,可以观察到三个Cubbi相的序列。非手性双回旋la3d相,手性“ Im3m”相和非手性折返la3d相。如果对于单个化合物或其混合物,沿着网络的分子之间的螺旋扭曲在8.6°-9.5°的范围内,则形成手性“ Im3m”相。