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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >A dual spectroscopic fluorescence probe based on carbon dots for detection of 2,4,6-trinitrophenol/Fe (III) ion by fluorescence and frequency doubling scattering spectra and its analytical applications
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A dual spectroscopic fluorescence probe based on carbon dots for detection of 2,4,6-trinitrophenol/Fe (III) ion by fluorescence and frequency doubling scattering spectra and its analytical applications

机译：基于碳点的双光谱荧光探针检测通过荧光和频率倍增散射光谱检测2,4,6-三苯酚/ Fe（III）离子及其分析应用

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摘要

A convenient, highly sensitive and reliable assay for 2,4,6 trinitrophenol (TNP) and Fe (III) ion (Fe3+) in the dual spectroscopic manner is developed based on novel carbon dots (CDs). The CDs with highly blue emitting fluorescent were easily prepared via the one-step potassium hydroxide-assisted reflux method from dextrin. The as synthesized CDs exhibited the high crystalline quality, the excellent fluorescence characteristics with a high quantum yield of -13.1%, and the narrow size distribution with an average diameter of 6.3 +/- 0.5 nm. Fluorescence and frequency doubling scattering (FDS) spectra of CDs show the unique changes in the presence of TNP/Fe3+ by different mechanism. The fluorescence of CDs decreased apparently in the presence of TNP via electron-transfer. Thus, after the experimental conditions were optimized, the linear range for detection TNP is 0-50 pm, the detection limit was 19.1 nM. With the addition of Fe3+, the FDS of CDs appeared to be highly sensitive with a quick response to Fe3+ as a result of the change concentration of the scattering particle. The emission peak for FDS at 450 nm was enhanced under the excitation wavelength at 900 nm. The fluorescence response changes linearly with Fe3+ concentration in the range of 8-40 pM, the detection limits were determined to be 44.1 nM. The applications of CDs were extended for the detection of TNP, Fe3+ in real water samples with a high recovery. The results reported here may become the potential tools for the fast response of TNP and Fe3+ in the analysis of environmental pollutants. (C) 2018 Elsevier B.V. All rights reserved.
机译：基于新型碳点（CDS）开发了双光谱方式的2,4,6-6三硝基苯酚（TNP）和Fe（III）离子（Fe3 +）的方便，高敏感和可靠的测定。通过从糊精的单步氢氧化钾辅助回流方法容易地制备具有高蓝色发光荧光的CD。作为合成的CD表现出高晶体质量，优异的荧光特性具有-13.1％的量高，窄尺寸分布，平均直径为6.3 +/- 0.5nm。 CDS的荧光和频率倍增散射（FDS）光谱显示出通过不同机制存在TNP / FE3 +的独特变化。通过电子转移，CD的荧光显然在TNP存在下显然降低。因此，优化实验条件后，检测TNP的线性范围是0-50μm，检测限为19.1nm。随着Fe3 +的添加，由于散射颗粒的变化浓度，CD的FDS对Fe3 +的快速响应看起来非常敏感。在900nm的激发波长下增强了450nm的FDS的发射峰。荧光反应随着Fe3 +浓度在8-40μm的范围内线性变化，测定检测限为44.1nm。 CDS的应用延长了在实际水样中检测TNP，Fe3 +，具有高回收率。这里报告的结果可能成为在环境污染物分析中TNP和FE3 +快速响应的潜在工具。 （c）2018年elestvier b.v.保留所有权利。

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  • 作者

    Xu Jinxia; Bai Zhangjun; Zu Fanlin; Yan Fanyong; Wei Junfu; Zhang Saihui; Luo Yunmei;

  • 作者单位

    Tianjin Polytech Univ Natl Ctr Int Joint Res Separat Membranes Sch Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Natl Ctr Int Joint Res Separat Membranes Sch Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Natl Ctr Int Joint Res Separat Membranes Sch Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Natl Ctr Int Joint Res Separat Membranes Sch Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Natl Ctr Int Joint Res Separat Membranes Sch Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Natl Ctr Int Joint Res Separat Membranes Sch Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Zunyi Med Univ Minist Educ Joint Int Res Lab Ethnomed Key Lab Basic Pharmacol Zunyi 563003 Peoples R China;

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  • 正文语种 eng
  • 中图分类 光化学分析法（光谱分析法）;
  • 关键词

    Carbon dots; Fluorescent; Frequency doubling scattering; 2; 4; 6 Trinitrophenol; Fe (Ill) ions;

    机译：碳点;荧光;频率加倍散射;2;4;6三硝基苯酚;Fe（Ill）离子;

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