School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430073, China.
"Petru Poni'' Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania.
Carbohydr Polym. 2019 Dec 1;225:115253. doi: 10.1016/j.carbpol.2019.115253. Epub 2019 Aug 27.
Nitroaromatic compounds, especially 2, 4, 6-trinitrophenol, have strong biological toxicity and explosive risks, so the detection of 2, 4, 6-trinitrophenol exhibit importantly practical and scientific significance. In this work, three fluorescence functionalized chitosan CNS 3, CNS 4 and CNS 5 were prepared using chitosan as matrix. When 2, 4, 6-trinitrophenol (TNP) and/or p-nitrophenol (4-NP) was present in spot, these fluorescent chitosan sensors produced notable fluorescence quenching. It renders the chitosan sensing ability to detect TNP and 4-NP selectively and sensitively. The sensing mechanism is investigated as well. When introduced electron-rich moieties to the fluorescent chitosan, the sensitive detecting ability could be obtained. Excellent recognition ability could reach as low as 0.28 μM. The fluorescence fictionalization cause slight influence to the gel performance of chitosan.
硝芳烃化合物，特别是 2,4,6-三硝基苯酚，具有很强的生物毒性和爆炸风险，因此 2,4,6-三硝基苯酚的检测具有重要的实际和科学意义。在这项工作中，使用壳聚糖作为基质，制备了三种荧光功能化壳聚糖 CNS3、CNS4 和 CNS5。当存在 2,4,6-三硝基苯酚（TNP）和/或对硝基苯酚（4-NP）时，这些荧光壳聚糖传感器产生了显著的荧光猝灭。这使得壳聚糖具有选择性和灵敏地检测 TNP 和 4-NP 的能力。同时也研究了传感机制。当向荧光壳聚糖中引入富电子基团时，可以获得灵敏的检测能力，其最低检测限可达 0.28 μM。荧光功能化对壳聚糖的凝胶性能影响很小。
