Design, synthesis and aggregation induced emission properties of two bichromophores with a triphenylamine-coumarin dyad structure
作者:Han Yan、Xinlei Meng、Baoyan Li、Shusheng Ge、Yun Lu
DOI:10.1016/j.dyepig.2017.07.046
日期:2017.11
fluorescence emission due to the aggregation induced emission effect and different degrees of positive solvatochromism due to their different molecular conformations in various solvents. Owing to the different push-pull electronic effects of substituents on the coumarin moiety, TC and TF, acting as the D-A compounds, showed different HOMO-LUMO gaps and a variable red-shifted emission in their solid-state
根据有关供体-受体(DA)三苯胺-香豆素(TPA-香豆素)二聚体的分子设计,两个新的双色团7-丁氧基-6-(4-(二苯氨基)苯基)-4,8-二甲基-2 H合成了-chromen-2-one(TC)和7-丁氧基-6-(4-(二苯基氨基)苯基)-8-甲基-4-(三氟甲基)-2 H -chromen-2-one(TF),通过使用IR,1 H NMR,13 C NMR和HRMS进行表征。无论TC和TF由于聚集诱导的发射效应而表现出预期的固态荧光发射,并且由于它们在各种溶剂中的不同分子构象而表现出不同程度的正溶剂化变色。由于香豆素部分上的取代基具有不同的推挽电子效应,因此,作为DA化合物的TC和TF在固态中显示出不同的HOMO-LUMO间隙和可变的红移发射,从而证实了有效地进行分离的可能性。通过合理的分子设计来调节这些双色团的光物理性质。