Colorimetric recognition of melamine in milk using novel pincer zinc complex stabilized gold nanoparticles
| Autor: | Lixin Duan, Qingshu Zheng, Junlong Qian, Yuzhu Zhang, Jianhong Liu, Tao Tu, Xiaoling Bao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Detection limit Salt (chemistry) chemistry.chemical_element 02 engineering and technology General Chemistry Zinc 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Thymine Pincer movement chemistry.chemical_compound chemistry Colloidal gold Naked eye 0210 nano-technology Melamine Nuclear chemistry |
| Zdroj: | Chinese Chemical Letters. 32:3023-3026 |
| ISSN: | 1001-8417 |
| DOI: | 10.1016/j.cclet.2021.04.014 |
| Popis: | A convenient colorimetric approach for visual detection of melamine in raw milk was realized by using gold nanoparticles (AuNPs) stabilized by an unsymmetrical terpyridyl zinc complex with a thymine fragment at one terminal and a quaternary ammonium salt at the other. Even without pre-addition of melamine or relative additives, obvious color change from red to blue was observed by naked eye in the presence of trace amount of melamine, which was attributed to the alternation of aggregation state of AuNPs caused by the selective binding between the thymine fragment and melamine via triple hydrogen-bonding interactions. Remarkably, the detection limit for melamine was as low as 2.4 ppb, providing a highly sensitive and efficient approach for the visual detection of melamine. |
| Databáze: | OpenAIRE |
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