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.2020.118784
关键词
Dual-channel; Chemosensor; Colorimetric; Fluorescence; Hg2+; Cu2+
类别
资金
- National Natural Science Foundation of China [21804084]
- China Postdoctoral Science Foundation [2019M653734, 2019M653850XB]
- Shaanxi Provincial Natural Science Basic Research Program [2017JQ2031, 2019JQ-456]
A novel dual-channel chemosensor, 7-allylquinolin-8-ol (AQ), was synthesized based on 8-hydroxyquinoline for selective fluorescence detection of Hg2+ and colorimetric recognition of Cu2+. The chemosensor reacted with Hg2+ and generated a new Hg-containing compound with significantly enhanced fluorescence, which turned from faint blue to strong green. Further experiments indicated that AQ could be used to quantitatively detect Hg(2+ )via fluorescence spectroscopy with a low detection limit (2.1 nM).The good reversibility of the synthesized chemosensor was also demonstrated using NaBH4. Moreover, AQ was successfully used for the detection of Cu2+ through the formation of a stable coordination compound, which exhibited an ultraviolet-visible (UV-Vis) ratiometric change, while its color changed from colorless to pale yellow under natural light. Additional experiments using various Cu2+ concentrations showed that the developed chemosensor could be further employed for the quantitative ratiometric estimation of Cu2+ by UV-Vis. (C) 2020 Elsevier B.V. All rights reserved.
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