A novel photo-switchable polymer P-PHT containing diarylethene (DAE) and tetraphenylethene (TPE) moieties and a triazole linker in the repeating unit was synthesized to study the aggregation-induced emission (AIE) behaviour of TPE with both the open and closed forms of DAE in P-PHT with high water contents. The photo-switching phenomena of DAE (from open to closed forms under UV-irradiation) in P-PHT were prominent in organic solvent (THF), high water contents (at 90% H₂O) and acidic conditions. Upon UV-irradiation of P-PHT at 90% water content, the AIE of TPE was completely quenched via an energy transfer event from TPE to cyclized DAE. Interestingly, the rare monomeric emission of TPE was first discovered by the photo-cyclization of DAE in P-PHT compared with the AIE behaviour of TPE with the open form of DAE in P-PHT with AIE favourable conditions of high water content (90% H₂O) and acidic conditions.

中文翻译：

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受二芳基乙烯环化和溶剂条件控制的可光转换聚合物中四苯乙烯的单体和聚集排放

合成了在重复单元中包含二芳基乙烯（DAE）和四苯基乙烯（TPE）部分和三唑连接基的新型光开关聚合物P-PHT，以研究开式和闭式TPE的聚集诱导发射（AIE）行为含量高的P-PHT中DAE的含量。在有机溶剂（THF），高水含量（在90％H ₂ O下）和酸性条件下，P-PHT中DAE的光转换现象（在紫外线照射下从开放形式转换为封闭形式）非常明显。在90％的含水量下对P-PHT进行紫外线照射后，TPE的AIE通过从TPE到环化DAE的能量转移事件。有趣的是，首先通过DAE在P-PHT中的光环化与TPE的AIE行为在P-PHT中具有DAE的开放形式以及AIE有利的高含水量条件（90％）相比发现了TPE的罕见单体发射。H ₂ O）和酸性条件。