基于硫、氮双掺型碳点的稀土荧光信号驱动式汞离子传感器

吴楚侨; 林鑫; 蒋腊生; 王前明

doi:10.37188/CJL.20210149

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基于硫、氮双掺型碳点的稀土荧光信号驱动式汞离子传感器

特邀报告 | 更新时间：2021-09-03

- 基于硫、氮双掺型碳点的稀土荧光信号驱动式汞离子传感器
  增强出版
- A Rare Earth Fluorescent Signal Driven Sensor for Mercury Based on Sulfur and Nitrogen Co-doped Carbon Dots
- 发光学报 2021年42卷第8期页码：1267-1277
- 作者机构：
  
  华南师范大学　化学学院，广东　广州　 510006
- 作者简介：
  
  [ "吴楚侨(1996-)，女，广东潮州人，硕士研究生，2020年于广州大学获得学士学位，主要从事量子点及其复合材料光学性能调控的研究。E-mail: 1340542360@qq.com" ]
  [ "王前明(1978-)，男，湖南长沙人，博士，研究员，博士研究生导师，2007年于同济大学获得博士学位，主要从事稀土光电功能材料及其在客体检测领域的应用、碳/硫点材料的研制、多种光学传感材料的分子设计与性能的研究。E-mail: qmwang@scnu.edu.cn" ]
- 基金信息：
  
  国家自然科学基金(21371063);广东省国际科技合作项目(2020A0505100055);广东省自然科学基金(2021A1515010324)
- DOI：10.37188/CJL.20210149
  中图分类号： O482.31
- 纸质出版日期：2021-08-01，
  
  收稿日期：2021-04-28，
  
  修回日期：2021-05-14，
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吴楚侨, 林鑫, 蒋腊生, 等. 基于硫、氮双掺型碳点的稀土荧光信号驱动式汞离子传感器[J]. 发光学报, 2021,42(8):1267-1277.

Chu-qiao WU, Xin LIN, La-sheng JIANG, et al. A Rare Earth Fluorescent Signal Driven Sensor for Mercury Based on Sulfur and Nitrogen Co-doped Carbon Dots[J]. Chinese Journal of Luminescence, 2021,42(8):1267-1277.
吴楚侨, 林鑫, 蒋腊生, 等. 基于硫、氮双掺型碳点的稀土荧光信号驱动式汞离子传感器[J]. 发光学报, 2021,42(8):1267-1277. DOI： 10.37188/CJL.20210149.

Chu-qiao WU, Xin LIN, La-sheng JIANG, et al. A Rare Earth Fluorescent Signal Driven Sensor for Mercury Based on Sulfur and Nitrogen Co-doped Carbon Dots[J]. Chinese Journal of Luminescence, 2021,42(8):1267-1277. DOI： 10.37188/CJL.20210149.

摘要

由于离子检测中荧光信号的单向变化经常受到光漂白、光散射、光源的不稳定性等因素的影响，导致了识别系统的可靠性极大降低。因此本文设计了一种由稀土铽配位引导的纳米级复合材料(S

N-CQDs@GMP/Tb)，实验在硫、氮双掺型碳量子点基础上组装了铽离子(Tb

) 和鸟苷单磷酸(GMP) 。材料在305 nm的激发波长激发下，能呈现出稀土离子

→

(

3) 4个跃迁信号和碳点自身蓝光发射并存的结果。汞离子的引入使得稀土的绿光减弱，碳点的蓝光增强；荧光滴定实验表明绿/蓝光比值与汞离子浓度呈线性对应关系，检测限低至7.04 nmol·L

-1

，线性范围10~110 nmol·L

-1

(

=0.982 9)。为了解决粉末材料取用困难的问题，实验采用滤纸为基底，得到了一种简易的固相检测器件，为实现污染离子的特异性识别提供了新思路。

Abstract

Since the signal change of the fluorescence in ion detection has always been affected by factors such as photobleaching

light scattering and instability of the light source

the reliability of the sensing system is significantly reduced. Therefore

a nano-scale composite material(S

N-CQDs@GMP/Tb) guided by rare earth terbium coordination has been designed in this paper. The experiment is to assemble terbium ions(Tb

) and guanosine monohydrate(GMP) on the basis of sulfur and nitrogen co-doped carbon quantum dots. The material can show the coexistence of four transition signals of rare earth ions

→

(

3) and the blue light emission of the carbon dots when excited by an excitation wavelength of 305 nm. The introduction of mercury ions suppresses the green light of rare earth and increases the blue light of carbon dots. Fluorescence titration experiments show that the ratio of green/blue light has a linear relationship with the concentration of mercury ions. The detection limit is as low as 7.04 nmol·L

-1

and the linear range is 10-110 nmol·L

-1

(

= 0.982 9). In order to solve the problem of difficult access to powder materials

the experiment uses filter paper as a substrate to obtain a simple solid-phase detection device

which provides a new way for the specific identification of pollutant ions.

关键词

鸟苷单磷酸铽离子比率荧光探针汞离子

Keywords

guanosine monophosphateterbium ionratio fluorescent probemercury ion

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