A novel fused two-dimensionally π-expanded triangular porphyrinoid has been designed. The synthesis is based on facile hexaazatrinaphthalene chemistry in combination with well-established condensation procedures to simultaneously close three porphyrinic cavities. A series of different functionalized π-expanded triangular derivatives were synthesized and their optical and electrochemical properties, as well as their supramolecular organization investigated. Low lying HOMO‒LUMO energy gaps between 1.11–1.32 eV were found for the highly π-conjugated planar triangular hexaazatrinaphthalene derivatives which organize into discotic liquid crystalline columnar stacks. Thereby, derivatives with alkoxy substituents reveal significantly higher order due to their improved flexibility in comparison to their alkyl counterparts.
我们设计出了一种新型融合的二维π扩展三角卟啉。该合成基于简便的六氮杂环萘化学反应,结合成熟的缩合程序,可同时封闭三个卟啉空穴。我们合成了一系列不同官能化的π-扩展三角形衍生物,并研究了它们的光学和电化学性质及其超分子结构。研究发现,高度 π 共轭的平面三角形六氮杂萘衍生物的 HOMO-LUMO 能隙在 1.11-1.32 eV 之间,这些衍生物组织成盘状液晶柱状堆栈。因此,与烷基衍生物相比,带有烷氧基取代基的衍生物具有更好的柔韧性,从而显示出更高的阶数。