期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 243, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2020.118763
关键词
Reactiion-based probes; Fluorescent polyurethane; Schiff base
类别
资金
- National Natural Science Foundation of China (NSFC) [41573106]
It is urgent and important to detect heavy metals in environments. In this work, novel reaction-based fluorescent probes were obtained by Schiff base reaction. The probes with Schiff base moiety (-C=N-) undergo irreversible hydrolysis in the presence of Hg2+ and Fe3+ . They exhibit perfect high selectivity and sensitivity to Hg2+ and Fe3+ ions. Upon the addition of Hg2+ and Fe3+, fluorescence intensity of the probes increased notably. And the color of the probe changes from brown to bright green under UV light, which can realize naked eye detection. In addition, Schiff base group was introduced into polyurethane chain through condensation polymerization reaction. As expected, the fluorescent polyurethane probe (P2) maintained the detection performance of its original small molecules (BSD). Even more P2 showed a more sensitive detection effect than BSD, and the detection limits of P2 for Hg2+ and Fe3+ reach 0.19 mu M and 021 mu M, respectively. It indicates that Reaction-based probes could be a useful tool for the detection of Hg2+ and Fe3+. (C) 2020 Elsevier B.V. All rights reserved.
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