State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry , Jilin University , Changchun 130012 , P. R. China.
Research Center of Energetic Material Genome Science, Institute of Chemical Materials , China Academy of Engineering Physics (CAEP) , Mianyang 621900 , P. R. China.
ACS Appl Mater Interfaces. 2018 Apr 18;10(15):13040-13047. doi: 10.1021/acsami.8b02330. Epub 2018 Apr 5.
Advances in the development of fluorescent carbon dots (CDs) for detecting nitro-explosives have attracted great interest. However, developing long-wavelength luminescence CDs for highly selective determination of 2,4,6-trinitrophenol (TNP) and getting insight into the detection mechanism remain further to be investigated. Here, excitation-independent yellow-green emission CDs with good photostability and low biotoxicity were introduced for detecting TNP selectively. Then, two types of electron transfer (ET) processes including hydrogen-bond interaction-assisted ET and proton transfer-assisted ET are suggested to be responsible for their photophysical behavior. Finally, the visual detection of TNP has been successfully developed by a CD-based indicator paper. The facile, highly sensitive, and selective detection for TNP in both of a solution and a solid phase makes CDs potentially useful in environmental sensor applications.
荧光碳点（CDs）在检测硝基爆炸物方面的发展引起了极大的关注。然而，开发用于高选择性测定 2,4,6-三硝基苯酚（TNP）的长波长发光 CDs 并深入了解其检测机制仍有待进一步研究。在这里，我们引入了具有良好光稳定性和低生物毒性的激发独立的黄绿光发射 CDs，用于选择性检测 TNP。然后，提出了两种电子转移（ET）过程，包括氢键相互作用辅助 ET 和质子转移辅助 ET，它们负责 CDs 的光物理行为。最后，通过基于 CD 的指示剂纸成功开发了 TNP 的可视化检测。这种在溶液和固相中的简便、高灵敏度和选择性检测 TNP 的方法使得 CDs 在环境传感器应用中具有潜在的应用价值。
