期刊
DYES AND PIGMENTS
卷 193, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109534
关键词
Fluorescent probes; Cyanide anions; Aggregation induced emission; DFT; Test strip
资金
- Shanghai Young Teachers Training and Support Program [slg20035]
- Shanghai Engineering Research Center for Food Rapid Detection
- College of Science, University of Shanghai for Science and Technology
A novel fluorescent sensor based on triphenylamine was designed for the sensitive detection of trace cyanide anions, featuring a low detection limit and excellent anti-interference performance, suitable for a wide range of pH values.
In this study, a novel fluorescent sensor 1 built on triphenylamine was designed for the extremely sensitive detection of trace cyanide anions. The UV absorbance and fluorescence emission intensity of sensor 1 with aggregation-induced emission (AIE) properties vary with water fraction (fw). In the 1% DMSO aqueous solution, sensor 1 exhibits the optimal aggregation state and fluorescence intensity, and has high selectivity and sensitivity for cyanide ions (CN-). From formula 3 delta/S, it is clear that sensor 1 has an extremely low limit of detection (LOD) for CN- (LOD = 2.95 x 10-8 mol/L). Excellent anti-interference performance and broad pH response scope (1.0-9.0) are also advantages of sensor 1. Fluorescence spectroscopy, 1H NMR, 13C NMR spectroscopy, HRMS, Job's plot analysis and density functional theory calculations have been employed to elucidate the sensing mechanism between TPEB and CN-. Through colorimetry and fluorescence approach, the sensor 1 test strip can easily detect CN-. Therefore, the novel sensor 1 provides a broad application prospect for detecting toxic environmental pollutants.
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