A carbon dots-based fluorescent probe for turn-on sensing of ampicillin

被引:77
作者
Fu, Yanzhao [1 ,2 ]
Zhao, Shaojing [1 ]
Wu, Shuilin [3 ,4 ]
Huang, Li [1 ]
Xu, Ting [1 ]
Xing, Xuejian [1 ]
Lan, Minhuan [1 ,2 ]
Song, Xiangzhi [1 ]
机构
[1] Cent South Univ, Coll Chem & Chem Engn, Key Lab Hunan Prov Water Environm & Agr Prod Safe, Changsha 410083, Hunan, Peoples R China
[2] Cent South Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
[3] City Univ Hong Kong, COSDAF, Hong Kong, Peoples R China
[4] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
基金
中国国家自然科学基金; 美国国家科学基金会;
关键词
Carbon dots; Fluorescent probe; Turn-on; Fe3+; Ampicillin; QUANTUM DOTS; NITROGEN; EXCITATION; CONVERSION; EMISSION; SULFUR;
D O I
10.1016/j.dyepig.2019.107846
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Carbon dots (CDs) with blue fluorescence were synthesized through hydrothermal treatment of p-dihydroxybenzene and hydrazine hydrate. The fluorescence of the investigated CDs could be selectively quenched by iron ions (Fe3+) because of the strong metal-ligand coordination and electrostatic interactions between the large amount of hydroxyl, amino, and carboxyl groups on CDs' surface and Fe3+. Interestingly, this non-fluorescent CDs + Fe3+ complex displayed a sensitive and selective turn-on fluorescence toward ampicillin with a limit of detection of 0.70 mu M. The sensing process could be observed by naked eyes under the 365 nm UV light irradiation. Importantly, CDs + Fe3+ complex had been successfully applied in the detection of ampicillin in river water.
引用
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页数:8
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