Flexible molecules are unfavorable for designing luminescent dyes because their excitation states rapidly decay through molecular motions. We recently found that some flexible boron complexes, which potentially show a larger degree of structural relaxation in the excited state, and their polymers exhibit unique optical properties with high environmental sensitivity, such as aggregation-induced emission and luminochromism triggered by external stimuli, upon the addition of structural restrictions. Moreover, these optical properties were drastically changed by modulating the connecting points in the polymers. In this review, recent progress in the development of luminescent polymer films with stimuli responsiveness is illustrated. In particular, the influence of the alteration of connecting points on luminescent behaviors is explained. Polymerization is a versatile strategy not only for transforming a class of nonemissive molecules into luminescent dyes but also for precisely regulating the optical properties of film materials; the resulting materials are promising for application as scaffolds for advanced chemical sensors. Recent progresses in the developments of luminescent polymer films with stimuli responsiveness are illustrated. In particular, the influence of the alteration of connecting points in polymers on luminescent behaviors is explained. It is demonstrated that polymerization is a versatile strategy not only for transforming a class of nonemissive flexible boron complexes to luminescent dyes but also for precisely regulating optical properties of film materials that are promised to be applied as a scaffold for advanced chemical sensors.

中文翻译：

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通过改变柔性硼元素块的连接点来调节共轭聚合物的固态发光性能

柔性分子不利于设计发光染料，因为它们的激发态会通过分子运动迅速衰减。我们最近发现一些灵活的硼配合物，在激发态可能表现出更大程度的结构弛豫，它们的聚合物表现出独特的光学性质和高环境敏感性，例如聚集诱导发射和由外部刺激触发的发光变色。增加结构限制。此外，通过调节聚合物中的连接点，这些光学特性发生了巨大的变化。在这篇综述中，阐述了具有刺激响应性的发光聚合物薄膜的最新进展。特别地，解释了连接点的改变对发光行为的影响。聚合是一种通用策略，不仅可以将一类非发光分子转化为发光染料，还可以精确调节薄膜材料的光学特性；所得材料有望用作先进化学传感器的支架。说明了具有刺激响应性的发光聚合物薄膜的最新进展。特别地，解释了聚合物中连接点的改变对发光行为的影响。结果表明，聚合是一种通用策略，不仅可以将一类非发光的柔性硼配合物转化为发光染料，还可以精确调节有望用作先进化学传感器支架的薄膜材料的光学特性。