期刊
ANALYST
卷 143, 期 20, 页码 -出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8an00940f
关键词
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资金
- National Natural Science Foundation of China [61671162]
- Technology Plan of Guangdong Province [2016A010103031]
- Guangdong Province Universities and Colleges Young Pearl River Scholar Funded Scheme (2016)
- Key Project of Educational Commission of Guangdong Province, China [2017KZDXM025]
- Guangzhou Science and Technology Program [201707010243]
Two novel highly selective quinoline-based fluorescent probes (1 and 2) with an aggregation induced emission (AIE) feature have been designed and synthesized for the rapid analysis of Cu2+ ions in aqueous media and on paper strips with a fluorescence quenching mechanism. Moreover, probes 1 and 2 exhibit excellent sensitivity and anti-interference for Cu2+ detection, and the detection limits are as low as 1.3 x 10(-8) M and 8.5 x 10(-8) M, respectively, which are much lower than the allowable standard of Cu2+ (approximate to 20 M) in drinking water (EPA). More importantly, these two probes were successfully applied for the determination of Cu2+ in real aqueous samples and fabrication of simple device test strips for rapid and on-site detection of Cu2+ ions. Interestingly, they can also be regenerated by adding an excess of S2-. Additionally, the crystallographic structure of probe 1 was confirmed through a single crystal X-ray study. Job's plot analysis and ESI-MS spectroscopic studies reflect the 1:1 complexation of the 1-Cu2+ and 2-Cu2+ complexes. Furthermore, DFT/TDDFT calculations were performed in order to help in understanding the electronic properties of the complexes and the chelation-induced quenching mechanism.
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