liquid‐crystalline mesophase. The structural study indicates that the thermotropic properties and organization of these systems can be well tuned by the steric demand of the aryl groups. Depending on the substituents, the compounds showed either a pure crystalline phase or a highly complex helical superstructure with a characteristic liquid‐crystalline phase at elevated temperatures. Changing the steric demand
通过
氰尿酰
氯和相应的
四唑的惠斯根反应已经制备了具有三倍二烷氧基芳基取代的三三唑三嗪。尽管这些
染料显示对UV / Vis吸收呈负性或反向溶剂化变色,但它们的荧光却是强烈的正溶剂化变色。这些盘状荧光团还以固态和宽液晶中间相发光。结构研究表明,可以通过芳基的空间需求很好地调节这些体系的热致性质和组织。根据取代基的不同,化合物在高温下会显示纯晶相或高度复杂的螺旋上层结构,并具有特征性的液晶相。