Perju Elena, Marin Luminita
"Petru Poni" Institute of Macromolecular Chemistry of Romanian Academy, 700487 Iasi, Romania.
Molecules. 2021 Apr 10;26(8):2183. doi: 10.3390/molecules26082183.
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 H-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.
通过柔性双苯甲醛与四种分别含有苯基、萘基、蒽基和芘基的芳香胺的缩合反应，合成了一系列新型偶氮甲碱二聚体。通过傅里叶变换红外光谱（FTIR）和氢核磁共振光谱（H-NMR）确定了它们正确的结构，并通过热重分析、差示扫描量热法和偏光光学显微镜研究了它们的热性能。通过紫外可见光谱和光致发光光谱了解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。两种含有芘部分的二聚体形成了介晶玻璃并具有强烈的发光，在构建光电器件方面具有良好的应用前景。
