Bridged Stilbenes: AIEgens Designed via a Simple Strategy to Control the Non-radiative Decay Pathway
Bridged Stilbenes: AIEgens Designed via a Simple Strategy to Control the Non-radiative Decay Pathway
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DOI：
10.1002/anie.202000943
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发表时间：
2020-03-26
影响因子：
16.6
通讯作者：
Konishi, Gen-ichi
中科院分区：
文献类型：
--
作者：
Iwai, Riki;Suzuki, Satoshi;Konishi, Gen-ichi
为了拓宽聚集诱导发射（AIE）发光体（AIEgens）的应用，需要设计在固态下具有高荧光量子产率（phi（fl））的新型小分子染料。考虑到AIE的机理可以基于空间位阻避免非辐射衰变途径来合理化，设计了一系列桥联二苯乙烯类化合物，并对其非辐射衰变途径进行了理论研究.具有短烷基链的桥连二苯乙烯在溶液和固体中表现出强的荧光发射，而具有长烷基链的桥连二苯乙烯表现出AIE。基于这一理论预测，我们开发了桥连二苯乙烯BPST[7]和DPB[7]，它们表现出优异的AIE行为。
To broaden the application of aggregation-induced emission (AIE) luminogens (AIEgens), the design of novel small-molecular dyes that exhibit high fluorescence quantum yield (phi(fl)) in the solid state is required. Considering that the mechanism of AIE can be rationalized based on steric avoidance of non-radiative decay pathways, a series of bridged stilbenes was designed, and their non-radiative decay pathways were investigated theoretically. Bridged stilbenes with short alkyl chains exhibited a strong fluorescence emission in solution and in the solid state, while bridged stilbenes with long alkyl chains exhibited AIE. Based on this theoretical prediction, we developed the bridged stilbenes BPST[7] and DPB[7], which demonstrate excellent AIE behavior.