A Simple and Rapid Label-free Fluorimetric “Turn Off-on” Sensor for Cadmium Detection Using Glutathione-capped CdS Quantum Dots

doi:10.1007/s40242-016-5448-4

高等学校化学研究 ›› 2016, Vol. 32 ›› Issue (4): 570-575.doi: 10.1007/s40242-016-5448-4

A Simple and Rapid Label-free Fluorimetric “Turn Off-on” Sensor for Cadmium Detection Using Glutathione-capped CdS Quantum Dots

TANG Xiaojian, WANG Jianhui, ZHAO Ke, XUE Honghai, TA Chunhong

Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, P. R. China

收稿日期:2015-11-20 修回日期:2016-01-19 出版日期:2016-08-01 发布日期:2016-02-28
通讯作者: TANG Xiaojian E-mail:txj0406@163.com
基金资助:
Supported by the National Natural Science Foundation of China(No.41403101).

A Simple and Rapid Label-free Fluorimetric “Turn Off-on” Sensor for Cadmium Detection Using Glutathione-capped CdS Quantum Dots

TANG Xiaojian, WANG Jianhui, ZHAO Ke, XUE Honghai, TA Chunhong

Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, P. R. China

Received:2015-11-20 Revised:2016-01-19 Online:2016-08-01 Published:2016-02-28
Contact: TANG Xiaojian E-mail:txj0406@163.com
Supported by:
Supported by the National Natural Science Foundation of China(No.41403101).

摘要/Abstract

摘要：

A convenient label-free fluorescence(FL) nanoprobe for rapid detection of cadmium(Cd) was established using glutathione-capped CdS quantum dots(QDs) and 1,10-phenanthroline(phen). The prepared CdS QDs exhibited a strong FL emission at 536 nm, which could be quenched by phen due to the photoinduced hole transfer(PHT) mechanism. The existence of Cd effectively recovered the FL intensity of CdS QDs, which was due to the easy detachment of phen from the surface of QDs to form[Cd(phen)₂(H₂O)₂]²⁺ in solution. Cd concentrations were linearly correlated with the FL intensity in the range of 0.0625-1.25 μmol/Lunder the optimized conditions and the detection limit was 0.01 μmol/L. Finally, the Cd concentration was accurately quantified in real water sample using the proposed sensor.

关键词: CdS quantum dot, Cadmium, 1,10-Phenanthroline, Photoinduced hole transfer mechanism

Abstract:

Key words: CdS quantum dot, Cadmium, 1,10-Phenanthroline, Photoinduced hole transfer mechanism

TANG Xiaojian, WANG Jianhui, ZHAO Ke, XUE Honghai, TA Chunhong. A Simple and Rapid Label-free Fluorimetric “Turn Off-on” Sensor for Cadmium Detection Using Glutathione-capped CdS Quantum Dots[J]. 高等学校化学研究, 2016, 32(4): 570-575.

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A Simple and Rapid Label-free Fluorimetric “Turn Off-on” Sensor for Cadmium Detection Using Glutathione-capped CdS Quantum Dots

A Simple and Rapid Label-free Fluorimetric “Turn Off-on” Sensor for Cadmium Detection Using Glutathione-capped CdS Quantum Dots

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