Construction of ratio fluorescence sensor based on CdTe quantum dots and benzocoumarin-3-carboxylic acid for Hg2+ detection

被引：9
|
作者：
Wang, Kun [1 ]
Dong, Er-Fei [1 ]
Fang, Min [1 ,2 ]
Chen, Ting [1 ]
Zhu, Wei-Ju [1 ,3 ]
Li, Cun [1 ,3 ,4 ]
机构：
[1] Anhui Univ, Sch Chem & Chem Engn, Hefei 230601, Peoples R China
[2] Anhui Univ, Anhui Prov Key Lab Environm Friendly Polymer Mat, Hefei 230601, Peoples R China
[3] Anhui Univ, AnHui Prov Key Lab Chem Inorgan Organ Hybrid Func, Hefei 230601, Peoples R China
[4] Anhui Univ, Sch Mat Sci & Engn, Hefei 230601, Peoples R China
来源：
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY | 2022年 / 50卷 / 04期
关键词：
Mea-CdTe quantum dots; Ratio fluorescence sensor; Benzocoumarin-3-carboxylic acid; He2+ ions detection; DOPED CARBON DOTS; SENSITIVE DETECTION; ULTRASENSITIVE DETECTION; GREEN SYNTHESIS; MERCURY; NITROGEN; IONS; NANOSENSOR; SPECIATION; EMISSION;
D O I：
10.1016/j.cjac.2022.100070
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new ratio fluorescence sensor based on mercaptamine capped cadmium telluride quantum dots (Mea-CdTe) and benzocoumarin-3-carboxylic acid (BTA) were constructed. The ratio fluorescence sensor (BTA@Mea-CdTe) was synthesized by amidation reaction between the amino groups on the surface of Mea-CdTe quantum dots and the carboxyl groups of BTA. It is found that Hg2+ ions react with the amino groups on the surface of the quantum dots in the BTA@Mea-CdTe sensor to quench the fluorescence, but it has no effect on the fluorescence of grafted BTA. The sensor has good selectivity and high sensitivity for Hg2+ ions detection. The detection linear range is 0.4-1.2 mu M, and the detection limit is 0.03 mu M. This ratio fluorescence sensor can be used for Hg2+ visual recognition in water sample detection with obvious color change.
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页数：8
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