Five newly designed organic small molecules (DSBTs, 1–5) with 3,3′-bithienyl unit had been successfully synthesized with 3-bromothiophene as the starting material. In both UV–vis absorption and fluorescence emission investigation, compound 3 with nitro-substitution exhibited the largest bathochromic shift and narrowest optical bandgap among 1–5. Further photophysical studies showed that 3 had obvious
五个新设计的有机小分子(DSBTs,1 - 5)与3,3'-二
噻吩基单元曾与
3-溴噻吩作为原料被成功地合成。在这两种UV-vis吸收和荧光发射的调查,化合物3与硝基取代表现出中为最大红移和最窄光学带隙1 - 5。进一步的光物理研究表明3具有明显的溶剂变色和聚集诱导发射(AIE)特性。电
化学性能和热稳定性研究表明3具有高的电子亲和力和良好的热稳定性,再加上良好的光学性能,表明3在光电子器件中有望成为有前景的材料。最后,关于结构,前沿分子轨道,UV-vis光谱和电子跃迁的理论计算很好地认识了光电特性与分子结构之间的关系。