Multilayer 3D Polymers as AIE-Based Fluorescent Sensors: Selective Detection of Silver and Barium Ions in Aqueous Media
Source abstract
Abstract
Two novel multi-layer three-dimensional polymers (Polymer 1 and Polymer 2) were designed and synthesized via a multi-step coupling strategy. Their photophysical properties, aggregation-induced emission (AIE) behaviors, and metal ion sensing capabilities were systematically investigated. Both polymers exhibited typical aggregation-induced emission (AIE) characteristics with significantly enhanced fluorescence upon aggregation in tetrahydrofuran (THF)/water mixtures. Polymer 1 demonstrated selective and sensitive detection of Ag+ ions with a detection limit of 2.14 μM, while Polymer 2 showed exceptional recognition toward Ba2+ ions with a detection limit of 6.42 μM. Competitive experiments confirmed their good selectivity even in the presence of interfering metal ions. The distinct sensing behaviors were attributed to the different coordination environments provided by the polymer backbones. This work expands the family of multi-layer three-dimensional AIE-active polymers and demonstrates their utility as fluorescent probes for the detection of silver and barium ions.
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Research context
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Affiliations
School of Overseas Education, Changzhou University, Changzhou 213164, China
Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, School of Pharmacy, Changzhou University, Changzhou 213164, China
Funding
Changzhou University
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