Colorimetric determination of copper ions based on regulation of the enzyme-mimicking activity of covalent triazine frameworks
| Autor: | Linjing Su, Yanghe Luo, Yuhao Xiong, Dongjian Zhu, Zhenlin Chen, Zhang Zhi, Xingcun He, Zhenhua Duan, Wei Xie |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
Inorganic chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Ion chemistry.chemical_compound Materials Chemistry Electrical and Electronic Engineering Instrumentation Triazine Detection limit biology Metals and Alloys Substrate (chemistry) 021001 nanoscience & nanotechnology Condensed Matter Physics Copper 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Covalent bond biology.protein 0210 nano-technology Peroxidase |
| Zdroj: | Sensors and Actuators B: Chemical. 253:384-391 |
| ISSN: | 0925-4005 |
| Popis: | Covalent triazine frameworks (CTFs) have garnered increasing interest recently because of their unique structures and properties. However, their application as enzyme mimics for sensing remains unexplored. In this study, an efficient strategy for selective colorimetric detection of Cu2+ ions was developed based on CTFs. This strategy relies on the peroxidase-like catalytic activity of CTFs being rationally modulated by Cu2+ ions. In the presence of Cu2+ ions, the peroxidase-like catalytic activity of the CTF is significantly stimulated and enhanced; this enables the CTF to catalyze the oxidation of the peroxidase substrate 3,3',5,5'-tetramethylbenzidine, which produces a color change from colorless to blue in the presence of H2O2. On the basis of the colorimetric method, a good linear relationship for Cu2+ ions can be obtained from 1.0 μg/L to 80.0 μg/L, with a limit of detection of 0.05 μg/L. When this strategy was assessed for the detection of Cu2+ ions in real food samples, recoveries of 96.0–105.0% were attained. The proposed CTF material and colorimetric method constitute a promising approach for the rapid detection of Cu2+ ions that is selective, sensitive, and low cost. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect