Journal
POLYMER CHEMISTRY
Volume 10, Issue 37, Pages 5037-5043Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9py01179j
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Funding
- National Natural Science Foundation of China [21606211, 21671178]
- Scientific Research Foundation for the Doctoral Program [2014BSJJ061]
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A novel chitosan-based fluorescent hydrogel has been synthesized by chemically bonding terpyridine-bearing aldehydes onto chitosan via an acid condensation reaction. More interestingly, such a hydrogel works as a dual-mode chemosensor for selective, rapid, gel-to-sol, and turn-off fluorescence sensing of Fe2+ ions. In the gel-to-sol mode, the detection limit for Fe2+ ions is 0.28 ppm, and in the turn-off fluorescence mode, the detection limit is 3.8 ppb. Such hydrogel-based fluorescent chemosensors are potentially suitable for the monitoring of Fe2+ in biological and environmental applications.
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