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大连理工大学 化学学院, 辽宁 大连 116024
[ "李如雪(1998-),女,山东济宁人,硕士研究生,2020年于山东师范大学获得学士学位,主要从事荧光探针的研究。 E-mail: lir857357320@163.com" ]
[ "周硼(1965-),女,辽宁大连人,博士,副教授,2003年于大连理工大学获得博士学位,主要从事荧光探针的研究。 E-mail: zhoupeng@dlut.edu.cn" ]
收稿日期:2023-05-17,
修回日期:2023-06-04,
纸质出版日期:2023-10-05
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李如雪,黄明玥,周硼等.基于双发射碳点的荧光探针构建及对水中铜离子的检测[J].发光学报,2023,44(10):1872-1880.
LI Ruxue,HUANG Mingyue,ZHOU Peng,et al.Construction of Fluorescence Probe Based on Carbon Dots Dual Emission Strategy and Ratio Detection of Copper Ions in Water[J].Chinese Journal of Luminescence,2023,44(10):1872-1880.
李如雪,黄明玥,周硼等.基于双发射碳点的荧光探针构建及对水中铜离子的检测[J].发光学报,2023,44(10):1872-1880. DOI: 10.37188/CJL.20230133.
LI Ruxue,HUANG Mingyue,ZHOU Peng,et al.Construction of Fluorescence Probe Based on Carbon Dots Dual Emission Strategy and Ratio Detection of Copper Ions in Water[J].Chinese Journal of Luminescence,2023,44(10):1872-1880. DOI: 10.37188/CJL.20230133.
为克服测试时环境变化对荧光检测的影响,我们设计合成了比率型荧光探针,利用双波长的荧光发射来有效消除背景干扰。本文以邻苯二胺、四硼酸钠和1⁃甲基⁃3⁃烯丙基咪唑溴盐为反应前体,利用一步水热法合成了基于碳点双发射的荧光探针L⁃CDs,并实现了对铜离子(Cu
2+
)的双信号响应。L⁃CDs表现出荧光双发射现象,当激发波长为380 nm时,呈现出440 nm和570 nm的双发射峰。Cu
2+
可使探针在440 nm处的荧光发射强度减弱,同时570 nm的荧光发射峰增强。Cu
2+
浓度在0.04~0.244 mmol/L范围内时,与荧光比率信号(
F
570
/
F
440
)表现出良好的线性相关,检出限(LOD)为0.6 μmol/L。所构建的荧光探针可用于实际水样中Cu
2+
的检测,回收率为99.4% ~ 101.8%。
In order to overcome the influence of environmental change on fluorescence detection, a ratio fluorescence probe was designed and prepared, and dual-wavelength fluorescence emission was used to effectively eliminate background interference. Using o-phenylenediamine, sodium tetraborate and 1-methyl-3-allyl imidazolium bromide as precursors, a one-step hydrothermal method has been developed to synthesize a ratio fluorescent probe based on carbon dots (L-CDs), and to achieve a double signal response to heavy metal ions (Cu
2+
). L-CDs exhibited fluorescence double emission phenomenon, and showed double emission peaks at 440 nm and 570 nm when the excitation wavelength was 380 nm. The addition of Cu
2+
can reduce the fluorescence emission intensity at 440 nm and increase the fluorescence emission peak value at 570 nm. The concentration of Cu
2+
in the range of 0.04-0.244 mmol/L showed a good linear correlation with the fluorescence ratio signal (
F
570
/
F
440
), and the detection limit (LOD) was 0.6 μmol/L. The fluorescence probe can be used for the detection of Cu
2+
in actual water samples with the recovery of 99.4%-101.4%.
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