Citation: Wei HE, Lan GONG, Shao-Wen DENG, Zhong-Yan LI, Lin YUAN. Synthesis and performance of four Zn²⁺ fluorescent probes based on Schiff bases[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(10): 1914-1922. doi: 10.11862/CJIC.2023.152 shu

Synthesis and performance of four Zn²⁺ fluorescent probes based on Schiff bases

School of Chemical and Biological Engineering, Hunan University of Science and Engineering, Yongzhou, Hunan 425199, China

Corresponding author: Lin YUAN, tcyl431102@163.com
Received Date: 9 March 2023
Revised Date: 8 June 2023

Figures(14)

Four fluorescent probes for zinc ion based on Schiff bases were synthesized from ethylenediamine and salicylaldehyde derivatives and their structures were characterized by ¹H NMR, ¹³C NMR, and IR. The spectral analysis results show that probe L2 has better selectivity and sensitivity to Zn²⁺ than other probes and the detection limit of probe L2 was 92.15 nmol·L^-1. There was a good linear relationship between the fluorescence intensity of probe L2 and the concentration of Zn²⁺ in a range of 0 to 10 μmol·L^-1. The visible fluorescence color change was observed with the naked eye under the ultraviolet lamp. The recognition mechanism was studied by Job's plot, NMR titration experiment, density functional theory calculation, and the crystal structure of the L2 - Zn²⁺ complex. The results showed that probe L2 was complexed with Zn²⁺ in a molar ratio of 1∶1. In addition, probe L2 could detect Zn²⁺ in actual water samples.
- Schiff base,
- fluorescent probe,
- zinc ion,
- identification mechanism,
- water sample detection
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Synthesis and performance of four Zn2+ fluorescent probes based on Schiff bases

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通讯作者: 陈斌, bchen63@163.com

Synthesis and performance of four Zn²⁺ fluorescent probes based on Schiff bases