基于二噻吩并［2，3-b：3′，2′-d］噻吩开环反应的二芘基四联噻吩的制备及其激基缔合物荧光行为

摘要

通过芘基锂对二（三甲基硅基）二噻吩并[2，3‐b ：3′，2′‐d]噻吩开环产生碳负离子，再经氯化铜氧化偶联，获得二芘基四联噻吩化合物。考察了该化合物在溶液中的光谱行为，结果表明，该化合物在溶液相的部分分子可以发生基于分子构象折叠而形成的分子内激基缔合物；在 T HF‐H2 O 二元体系中可以形成分子间的基于激基缔合物的聚集诱导发光现象。%Using pyrenyl lithium for the ring‐opening of di(trimethylsilanyl)‐dithieno [2 ,3‐b :3′ ,2′‐d]thiophene (DTMS‐DTT) ,the formed intermediate of carbanion of bithiophene species is oxidized by CuCl2‐promoted coupling to generate pyrenyl end‐capped quarterthiophene (BPSQT) .BPSQT shows both extended and folded configurations in solution ,and the folded configuration gives intramolecular excimer emission .In T HF‐H2 O binary solvent system , BPSQT shows strong aggregation‐induced emission (AIE) behavior from its intermolecular ex‐cimer .