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It is of scientific and practical significance to sense and to remove heavy metal ions in the environment. In this work, four BODIPY-based fluorescent polymeric probes with the ability to sense and separate Fe 3+  ions have been prepared via thiol-ene click reaction. The polymers have good thermal stability. Meanwhile, the results show that they have selective recognition capabilities only for Fe 3+ , which are mainly manifested as significant quenching of fluorescence and color modulation under visible light. The sensitivity is good, and the limit of detection reaches as low as 0.14 µM. They can also be used as reversible chemical probes to detect Fe 3+ . Therefore, the click reaction provides us with a facile method for preparing fluorescent polymer probes.

BODIPY-based fluorescent polymeric probes for selective detection of Fe3+ ions in aqueous solution