A series of new azomethine dimers was synthesized by the condensation reaction of flexible bis-benzaldehydes with four aromatic amines containing phenyl, naphthyl, anthracene and pyrene groups. Their right structure was confirmed by FTIR and 1H-NMR spectroscopy and their thermal properties were investigated by thermogravimetric analysis, differential scanning calorimetry and polarized light optical microscopy. A view on their photophysical behavior was gained by UV-vis and photoluminescence spectroscopy. The dimers containing pyrene and anthracene presented liquid crystalline behavior, while the other dimers were crystalline compounds. Two dimers containing pyrene moieties formed mesomorphic glasses and had intense luminescence, promising properties for applications in building optoelectronic devices.
一系列新的偶氮亚甲基二聚体通过柔性双苯甲醛与含有苯基、萘基、蒽基和芘基的四种芳香胺的缩合反应合成。它们的正确结构经过傅立叶红外光谱和1H-NMR光谱确认,它们的热性质通过热重分析、差示扫描量热法和偏光光学显微镜进行研究。通过紫外-可见光谱和光致发光光谱获得了它们的光物理行为。含有芘和蒽的二聚体呈现液晶行为,而其他二聚体是结晶化合物。含有芘基团的两个二聚体形成了介晶玻璃,并具有强烈的发光,这些性质有望应用于光电子器件的制造。