Synthesized of Carbon Quantum Dots from Red Dates and as A &ldquo;Off-On&rdquo; Fluorescence Probe for High Sensitive Detection of Rutin

WANG Jing-yuan; ZHANG Yue-cheng; MA Hong-yan; LIU Xiao-li; WANG Qi

doi:10.3788/fgxb20183904.0600

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Synthesized of Carbon Quantum Dots from Red Dates and as A “Off-On” Fluorescence Probe for High Sensitive Detection of Rutin

更新时间：2020-08-12

- Synthesized of Carbon Quantum Dots from Red Dates and as A “Off-On” Fluorescence Probe for High Sensitive Detection of Rutin
- Chinese Journal of Luminescence Vol. 39, Issue 4, Pages: 600-607(2018)
- 作者机构：
  
  延安大学化学与化工学院延安市分析技术与检测重点实验室,陕西延安,716000
- 作者简介：
- 基金信息：
  
  Supported by Natural Science Basic Research Program of Shaanxi Province(2014JM2056)(
- DOI：10.3788/fgxb20183904.0600
  CLC： O657.3
- Received：15 August 2017，
  
  Revised：18 October 2017，
  
  Published Online：25 October 2017，
  
  Published：05 April 2018
- 稿件说明：
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王靖原, 张越诚, 马红燕等. 红枣碳量子点“关-开”型荧光探针检测芦丁的研究[J]. 发光学报, 2018,39(4): 600-607

WANG Jing-yuan, ZHANG Yue-cheng, MA Hong-yan etc. Synthesized of Carbon Quantum Dots from Red Dates and as A “Off-On” Fluorescence Probe for High Sensitive Detection of Rutin[J]. Chinese Journal of Luminescence, 2018,39(4): 600-607
王靖原, 张越诚, 马红燕等. 红枣碳量子点“关-开”型荧光探针检测芦丁的研究[J]. 发光学报, 2018,39(4): 600-607 DOI： 10.3788/fgxb20183904.0600.

WANG Jing-yuan, ZHANG Yue-cheng, MA Hong-yan etc. Synthesized of Carbon Quantum Dots from Red Dates and as A “Off-On” Fluorescence Probe for High Sensitive Detection of Rutin[J]. Chinese Journal of Luminescence, 2018,39(4): 600-607 DOI： 10.3788/fgxb20183904.0600.

摘要

以红枣为原料，通过一步水热法合成了具有强烈荧光的碳量子点（CQDs），通过荧光光谱、紫外-可见光谱、红外光谱、X射线粉末衍射光谱对其发光特性进行了研究，并基于KMnO

与CQDs形成无辐射复合体，构建了"关-开"型荧光探针用于芦丁的高灵敏度检测。实验发现，在pH=4.00的HAc-NaAc缓冲溶液中，KMnO

的加入可使CQDs的荧光发生显著猝灭，体系的荧光信号处于"关闭"状态；加入芦丁后，由于KMnO

更易与还原性药物芦丁发生反应，将KMnO

从CQDs表面移除下来，使CQDs的荧光得以恢复，体系的荧光信号处于"打开"状态。对反应的机理进行初步探讨，考察了各种反应条件，在优化的实验条件下，CQDs荧光探针荧光恢复值

与芦丁的浓度在2.510

-7

~1.010

-5

mol/L范围内呈良好线性关系，方法检出限为1.510

-7

mol/L。该方法应用于样品中芦丁的测定，结果满意。

Abstract

A one-step hydrothermal method was developed for the preparation of carbon quantum dots(CQDs) with strong fluorescence by using red dates as precursors. The luminescence properties of the CQDs were studied by fluorescence spectroscopy

UV-Vis spectrum

transmission electron microscopy

infrared spectrum

X-ray powder diffraction spectroscopy. In pH=4.00 NaAc-HAc buffer solution

after potassium permanganate(KMnO

) was added in CQDs solution

the fluorescence of CQDs was quenched

and the fluorescence signal of the system was in the "off" state. In the presence of rutin

the fluorescence of CQDs was recovered because KMnO

preferred to react with rutin

which results in the departure of KMnO

from the surface of the CQDs

and the fluorescence signal of the system was "open". The degree of recovery of CQDs fluorescence intensity was proportional to the rutin concentration

which provided a new method for the detection of rutin with high sensitivity and selectivity based on the fluorescence quenching-recovery properties of CQDs. The mechanism of fluorescence quenching of CQDs by KMnO

was studied

and the reaction conditions were optimized. Under optimal conditions

the recovered fluorescence of CQDs is linearly related with the rutin concentration in the range 2.510

-7

-1.010

-5

mol/L

the detection limit is 1.510

-7

mol/L. The present method is applied for the detection of rutin in samples with satisfactory results.

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Keywords

references

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Synthesized of Carbon Quantum Dots from Red Dates and as A “Off-On” Fluorescence Probe for High Sensitive Detection of Rutin

DOI：10.3788/fgxb20183904.0600

摘要

Abstract

关键词

Keywords

references