Solvated assembly and fluorescence are two distinct features of conjugated polyelectrolytes for remarkable optoelectronic properties. However, the essential correlation between solvated assembly and fluorescence properties is still undiscovered. Here, two homopolymers based on benzotriazole (BTz) backbones with pyridinium cation‐pendants (PBTz‐PyrBr) and quaternary amine cation‐pendants (PBTz‐TMABr) are designed to distinguish fluorescence response in polar solvents, which evokes a novel application in fluorescence‐dependence solvent detection. The conjugated backbones offer orderly aligned electron‐rich nitrogen atoms to chemically react with the quaternary amine cation‐pendants for creating a space conjugation, serving as a fluorescence sensing site in polar solvents. In low‐polarity solvents, conjugated chains tend to twist and aggregate, accompanied by the space‐conjugation enhancement. This behavior increases the fluorescence performance by suppressing both inter‐ and intra‐molecular charge transfer. Furthermore, a theoretical linear‐correlation is established between fluorescence and solvent polarity/concentration to elucidate the experimental rule, giving a robust opportunity for solvent detection.

中文翻译：

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用于荧光依赖性溶剂检测的溶剂诱导聚电解质偶联


溶剂化组装和荧光是共轭聚电解质的两个不同特征，具有显著的光电特性。然而，溶剂化组装和荧光特性之间的基本相关性仍未被发现。本文设计了两种基于苯并三唑 （BTz） 主链与吡啶阳离子垂 （PBTz-PyrBr） 和季胺阳离子垂 （PBTz-TMABr） 的均聚物，用于区分极性溶剂中的荧光响应，这在荧光依赖性溶剂检测中引发了新的应用。共轭骨架提供有序排列的富电子氮原子，与季胺阳离子坠子发生化学反应，形成空间共轭，在极性溶剂中用作荧光传感位点。在低极性溶剂中，共轭链往往会扭曲和聚集，并伴有空间共轭增强。这种行为通过抑制分子间和分子内电荷转移来提高荧光性能。此外，在荧光和溶剂极性/浓度之间建立理论线性相关性以阐明实验规则，为溶剂检测提供了可靠的机会。