Journal
TALANTA
Volume 234, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2021.122612
Keywords
Luminol; Aggregation-induced emission; Ratiometric fluorescence probe; Tetracycline; Visual detection
Categories
Funding
- Science and Technology Research Project of Education Department of Jiangxi Province [GJJ190615]
- Natural Science Foundation of Jiangxi Province [20171ACB20025, 20202BAB213018]
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention [FDLAP19004]
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A ratiometric fluorometric method based on luminol-Europium complex was developed for the detection of tetracycline, showing quenching of fluorescence at 453 nm due to inner filter effect in the presence of TC and observation of Eu3+ emission peak at 626 nm thanks to antenna effect. This strategy is fast, sensitive, and visual for TC detection, allowing for detection from 0.5 to 80 mu M with a detection limit of 39 nM, and demonstrating color change from blue to red in real samples using luminol-Eu-based test paper under 365 nm ultraviolet light.
In this work, a ratiometric fluorometric method based on luminol-Europium complex (luminol-Eu) was constructed for the detection of tetracycline (TC). Luminol-Eu, synthesized by self-assembly reaction, displayed a strongly emission peak at 453 nm under excitation at 360 nm which was derived from the aggregation-induced emission (AIE) of the luminol-Eu. In the present of TC, the fluorescence of luminol-Eu at 453 nm was quenched based on inner filter effect (IFE). Meantime, the characteristic emission peak of Eu3+ at 626 nm can be observed thank to antenna effect (AE). Therefore, we proposed a ratiometric fluorometric method for detection of TC, which allowed detection of TC from 0.5 to 80 mu M with the detection limit of 39 nM. In addition, the luminol-Eu-based test paper was prepared for visual semi-quantitative detection of TC in real samples based on the color of luminol-Eu change from blue to red under 365 nm ultraviolet light. All of those results indicated that the ratiometric fluorometric strategy was fast, sensitive, and visual for detection of TC.
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