Stimuli-responsive luminescent polymer is generally prepared by incorporation of both stimuli-responsive and luminescent moieties into polymer chain, which cause difficulties in molecular design and synthesis. The preparation of stimuli-responsive luminescent polymer from one moiety represents a time-saving approach and is highly desirable. Here, we demonstrate a simple approach to achieve stimuli-responsive luminescent polymers through polymerization-induced emission of nonemissive borinic acid moiety. Attributed to versatile borinic acid moiety, the prepared borinic acid polymer (PBA) exhibits upper critical solution temperature (UCST) type thermo-responsive behavior and chemical sensitivities. Interestingly, PBA is not only stimuli-responsive but also luminescent, while the repeating borinic acid moiety is nonemissive, indicating borinic acid is a novel PIE luminogen (PIEgen). This work therefore opens a new avenue to molecularly design stimuli-responsive luminescent polymer from nonemissive borinic acid moiety, which might cause inspirations to the fields of boron chemistry, stimuli-responsive polymer and luminescent polymer.

中文翻译：

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硼酸向刺激响应发光聚合物的聚合诱导发射

刺激响应发光聚合物通常是通过将刺激响应部分和发光部分同时引入到聚合物链中来制备，这给分子设计和合成带来了困难。从一个部分制备刺激响应发光聚合物代表了一种节省时间的方法并且是非常理想的。在这里，我们展示了一种通过聚合诱导非发射硼酸部分的发射来实现刺激响应发光聚合物的简单方法。由于具有多功能的硼酸部分，所制备的硼酸聚合物（PBA）表现出上临界溶液温度（UCST）型热响应行为和化学敏感性。有趣的是，PBA不仅具有刺激响应性，而且还具有发光性，而重复的硼酸部分则不发光，这表明硼酸是一种新型的PIE发光体（PIEgen）。因此，这项工作为从非发射硼酸部分分子设计刺激响应发光聚合物开辟了一条新途径，这可能会给硼化学、刺激响应聚合物和发光聚合物领域带来启发。