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We report a fluorescent supramolecular polymer networks (SPNs) system based on crown ether‐cation recognition. The polymer side chains bear ammonium cations, which can be recognized by host molecules with a B15C5 unit and a quinoline group at each end. The quinoline group makes the host molecule exhibit blue fluorescence. After the formation of SPNs, the recognition of the crown ether‐cation transforms...
In biological systems, the selective and high‐affinity recognition of anionic species is accomplished by macromolecular hosts (anion‐binding proteins) that have been “optimized” through evolution. Surprisingly, it is only recently that chemists have systematically attempted to develop anion‐responsive synthetic macromolecules for potential applications in medicine, national security, or environmental...
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