The construction of chiral polymers using dynamic covalent chemistry is a convenient and straightforward strategy for obtaining functional materials. In this paper, we report the dynamic covalent polymers , , and with dual dynamic covalent bonds of imine and boronic ester, and their recognition of fluoride ions. The three polymers are prepared from L-DOPA hexyl ester and 2-, 3-, and 4-formylphenylboronic acids, respectively. Iminoboronate, formed within repeated units, results in the formation of a spirochiral structure centered at -B and, consequently, the chiral twist or helix conformation of the polymer backbone. exhibits distinctive chiroptical features that distinguish it from and . Due to the strong competitive bonding of fluoride with boron, has a low LOD (Limit of detection) for fluoride (0.018 mg/L). also has good selectivity for fluoride via the responsive destruction of the spirochiral structure and the chiral conformation of the backbone. The construction of these chiral dynamic polymers provides a rapid and effective approach to designing functional polymers.

中文翻译：

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基于亚氨基硼酸酯的手性动态共价聚合物用于选择性和灵敏的氟化物识别

使用动态共价化学构建手性聚合物是获得功能材料的一种方便且直接的策略。在本文中，我们报道了具有亚胺和硼酸酯双动态共价键的动态共价聚合物 、 和 ，以及它们对氟离子的识别。这三种聚合物分别由 L-DOPA 己酯和 2-、3-和 4-甲酰基苯基硼酸制备。在重复单元内形成的亚氨基硼酸盐导致形成以-B为中心的螺手性结构，从而形成聚合物主链的手性扭曲或螺旋构象。表现出独特的手性光学特征，将其与 和 区分开来。由于氟化物与硼的竞争性键合很强，氟化物的 LOD（检测限）较低 (0.018 mg/L)。通过响应性破坏螺旋手性结构和主链的手性构象，对氟化物也具有良好的选择性。这些手性动态聚合物的构建为设计功能聚合物提供了快速有效的方法。