过氧化氢
硼氢化钠
纳米团簇
壳聚糖
荧光
检出限
铜
化学
核化学
无机化学
光化学
组合化学
催化作用
有机化学
色谱法
物理
量子力学
作者
Jiaojiao Lu,Dawei Wang,Xin Li,Wei Guo,Chunyuan Tian,Feng Luan,Xuming Zhuang
出处
期刊:Biosensors
[MDPI AG]
日期:2023-03-09
卷期号:13 (3): 361-361
摘要
Hydrogen peroxide (H2O2) is an important reactive oxygen species that mediates a variety of physiological functions in biological processes, and it is an essential mediator in food, pharmaceutical, and environmental analysis. However, H2O2 can be dangerous and toxic at certain concentrations. It is crucial to detect the concentration of H2O2 in the environment for human health and environmental protection. Herein, we prepared the red-emitting copper nanoclusters (Cu NCs) by a one-step method, with lipoic acid (LA) and sodium borohydride as protective ligands and reducing agents, respectively, moreover, adding chitosan (CS) to wrap LA-Cu NCs. The as-prepared LA-Cu NCs@CS have stronger fluorescence than LA-Cu NCs. We found that the presence of H2O2 causes the fluorescence of LA-Cu NCs@CS to be strongly quenched. Based on this, a fluorescent probe based on LA-Cu NCs@CS was constructed for the detection of H2O2 with a limit of detection of 47 nM. The results from this research not only illustrate that the as--developed fluorescent probe exhibits good selectivity and high sensitivity to H2O2 in environmental water samples but also propose a novel strategy to prepare red-emitting copper nanoclusters (Cu NCs) by a one-step method.
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