Fluorescence switching sensor for sensitive detection of sinapine using carbon quantum dots

文献类型： 外文期刊

第一作者： Xiang, Xia

作者： Xiang, Xia;Zhang, Zhen;Han, Ling;Huang, Fenghong;Zheng, Mingming;Tang, Hu;Deng, Qianchun

作者机构：

关键词： Fluorescence switching sensor;Sinapine;Carbon quantum dots;Copper ions;Fluorescence quenching

期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：7.46； 五年影响因子：6.743 ）

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收录情况： SCI

摘要： A new fluorescence switching sensor for sensitive detection of sinapine (SP) was developed based on aggregation and disaggregation of carbon quantum dots (CDs) with the assistance of copper ions (Cu2+). In the detection, carboxyl group on the surface of CDs enables the aggregation triggered by Cu2+ due to the effective coordination, inducing obvious fluorescence quenching. Upon the addition of SP into the solution, higher affinity between SP and Cu2+ is found to from SP-Cu coordination complex, leading to re-dispersion and fluorescence recovery of CDs. The fluorescence switching sensor for SP detection has advantages of simplicity, rapidness, high sensitivity and selectivity. The quantitative range for SP detection is from 0.04 to 5 mu g mL(-1) with the detection limit of 0.02 mu g mL(-1). In practical samples, the recoveries of the samples ranged from 87.9% to 117.0%. (C) 2016 Elsevier B.V. All rights reserved.

分类号： TP212.2

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