Abstract
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 Fe3+ 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 Fe3+, 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 Fe3+. Therefore, the click reaction provides us with a facile method for preparing fluorescent polymer probes.
Highlights
Heavy metals have become serious pollutants due to their difficulty in treatment [1]
The Boron dipyrromethene (BODIPY)-based small molecule is designed and two C= C/C≡C groups are introduced to each molecule, making it one of the constructing modules of polymers
The thiol compound is selected as another building module to successfully synthesize fluorescent polymers probes via thiol-ene click reaction
Summary
Heavy metals have become serious pollutants due to their difficulty in treatment [1]. The identification and separation of heavy metal ions are still of great significance. Researchers have developed many methods for detecting heavy metal ions [2]. Boron dipyrromethene (BODIPY) fluorescent dyes can overcome these shortcomings. They have attracted enormous interest due to high fluorescence quantum yield, stable spectral properties, and large extinction coefficient [6]. Due to the excellent physical and chemical properties, a wide range of applications have been demonstrated, such as in fluorescent probes, environmental management, and fluorescent labeling of biomolecules [7]. Polymers constructed by these two ways have certain applications in detecting and removing heavy metal ions [9, 10]. Haldar et al [11] have synthesized a water-soluble BODIPY side-chain polymer integrated
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