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陕西理工大学 化学与环境科学学院, 陕西省催化基础与应用重点实验室, 陕西 汉中 723000
Received:10 February 2022,
Revised:08 March 2022,
Published:05 June 2022
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王芹,刘智峰,李利华等.一种比色/荧光增强型碳点基纳米探针用于环境中苯硫酚的高选择性检测[J].发光学报,2022,43(06):986-994.
WANG Qin,LIU Zhi-feng,LI Li-hua,et al.A Colorimetric/Fluorescent-enhanced Carbon Dots Based Nanoprobe for Highly Selective Detection of Thiophenol in Environmental Sample[J].Chinese Journal of Luminescence,2022,43(06):986-994.
王芹,刘智峰,李利华等.一种比色/荧光增强型碳点基纳米探针用于环境中苯硫酚的高选择性检测[J].发光学报,2022,43(06):986-994. DOI: 10.37188/CJL.20220044.
WANG Qin,LIU Zhi-feng,LI Li-hua,et al.A Colorimetric/Fluorescent-enhanced Carbon Dots Based Nanoprobe for Highly Selective Detection of Thiophenol in Environmental Sample[J].Chinese Journal of Luminescence,2022,43(06):986-994. DOI: 10.37188/CJL.20220044.
苯硫酚(Thiophenol,PhSH)是一种剧毒物质,对环境和健康危害极大,因此,对环境中PhSH的快速检测具有重要意义。本工作中,碳点基纳米探针(
CD-DNS
)以2,4-二硝基苯磺酰胺为识别基团,实现了环境样品中PhSH的高选择性检测。探针
CD-DNS
溶液本身的荧光强度较弱,加入PhSH后,
CD-DNS
与其发生亲核取代反应,2,4-二硝基苯磺酰胺键断裂,释放出荧光团,导致探针的荧光强度和吸光度显著增强。进一步研究表明,
CD-DNS
在520 nm处的荧光强度和440 nm处的吸光度随着PhSH浓度的增加呈线性增加,线性范围为0~5 μmol/L。该探针对PhSH的检测具有反应速度快(4 min)、选择性好等特点。此外,
CD-DNS
可用于环境水样中PhSH的检测,且可制备成试纸条实现PhSH的半定量可视化检测。实验结果表明,碳点基纳米探针
CD-DNS
在环境领域具有广阔的潜在应用前景。
Thiophenol(PhSH) is a highly toxic substance, which does great harm to environment and health. Therefore
the rapid detection of PHSH in the environment is of great significance. In this work, the carbon dot(CD)-based nanoprobe
CD-DNS
used 2,4-dinitrobenzenesulfonyl as the recognition group was performed to achieve a highly selective detection of PhSH in the environmental samples. The CD-based nanoprobe
CD-DNS
solution exhibited very weak fluorescence and absorbance. After adding PhSH, the 2,4-dinitrobenesulfonamide moiety of
CD-DNS
could be readily cleaved
via
nucleophilic substitution reaction, leading to a dramatic increase of fluorescence intensity and absorbance of the probe. Further studies showed that the fluorescence intensity at 520 nm and absorbance at 440 nm of the probe showed a good linear relationship with the PhSH concentration, with a linear range of 0-5 μmol/L. The established detection probe displayed fast reaction(4 min) and high selectivity towards PhSH. In addition,
CD-DNS
could be used for the detection of PhSH in environmental water samples, and also could be prepared into a strip to realize the semi-quantitative visual detection of PhSH. The experimental results show that the CD-based nanoprobe
CD-DNS
has a potential application prospect in the environmental field.
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