A novel AIE "on-off-on" fluorescence sensor for highly selective and sensitive sequential detection of Fe3+ and HSO3- in foods

被引：20
作者：
Cai, Xin [1 ]
Ye, Jianping [1 ]
Zhou, Qing [1 ]
Yan, Zhihong [1 ]
Li, Kang [1 ]
机构：
[1] Guangdong Pharmaceut Univ, Sch Pharm, Guangzhou 510006, Peoples R China
来源：
MICROCHEMICAL JOURNAL | 2020年 / 159卷
基金：
中国国家自然科学基金;
关键词：
4,4 '-Stilbene dicarboxylic acid; Aggregation-induced emission; Fluorescence sensor; Fe3+; HSO3-; PLASMA-MASS SPECTROMETRY; QUANTUM DOTS; SULFUR SPECIATION; SULFITE; MECHANISMS; PROBE; CHROMATOGRAPHY; LUMINOGENS; DIOXIDE; MOF;
D O I：
10.1016/j.microc.2020.105419
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
It was discovered for the first time that 4,4 '-stilbene dicarboxylic acid (H2SDC) had an aggregation-induced emission (AIE) property. H2SDC has a very weak fluorescence emission in DMF, but it can emit bright cyan light in DMF/H2O (v:v = 1:9, pH 4.0) solution in the aggregated state. The fluorescence of H2SDC in the aggregated state can be quenched by Fe3+ through a dynamic quenching mechanism and has a good selectivity. Also, HSO3- can restore the fluorescence of the H2SDC-Fe3+ system by redox. Therefore, Fe3+ and HSO3- can be detected by constructing an "on-off-on" method. The detection limits of Fe3+ and HSO3- are about 18.5 and 38.4 nM, respectively. And the method has a reasonable recovery rate and a relatively small standard deviation in the actual detection of functional foods. The "on-off-on" phenomenon of H2SDC fluorescence can also be seen under the portable UV lamp (365 nm), indicating that H2SDC has the potential to detect Fe3+ and HSO3- colorimetrically on site.
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页数：7
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