Liu Weitao, Ali Wajid, Liu Ye, Li Mingliang, Li Ziwei
Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, Hunan University, Changsha 410082, China.
Department of Chemistry, The University of Hong Kong, Hong Kong 999077, China.
Micromachines (Basel). 2023 Nov 29;14(12):2179. doi: 10.3390/mi14122179.
Fluorescence probe technology holds great promise in the application of trace explosive detection due to its high sensitivity, fast response speed, good selectivity, and low cost. In this work, a designed approach has been employed to prepare the TPE-PA-8 molecule, utilizing the classic aggregation-induced emission (AIE) property of 1,1,2,2-tetraphenylethene (TPE), for the development of self-assembled monolayers (SAMs) targeting the detection of trace nitroaromatic compound (NAC) explosives. The phosphoric acid acts as an anchoring unit, connecting to TPE through an alkyl chain of eight molecules, which has been found to play a crucial role in promoting the aggregation of TPE luminogens, leading to the enhanced light-emission property and sensing performance of SAMs. The SAMs assembled on AlO-deposited fiber film exhibit remarkable detection performances, with detection limits of 0.68 ppm, 1.68 ppm, and 2.5 ppm for trinitrotoluene, dinitrotoluene, and nitrobenzene, respectively. This work provides a candidate for the design and fabrication of flexible sensors possessing the high-performance and user-friendly detection of trace NACs.
荧光探针技术因其高灵敏度、快速响应速度、良好的选择性和低成本，在痕量爆炸物检测应用中具有巨大潜力。在这项工作中，采用了一种设计方法来制备TPE-PA-8分子，利用1,1,2,2-四苯乙烯（TPE）经典的聚集诱导发光（AIE）特性，开发用于检测痕量硝基芳香化合物（NAC）爆炸物的自组装单分子层（SAMs）。磷酸作为锚定单元，通过八个分子的烷基链与TPE相连，可以发现它在促进TPE发光体聚集方面起着关键作用，从而导致SAMs的发光性能和传感性能增强。组装在AlO沉积纤维膜上的SAMs表现出卓越的检测性能，对三硝基甲苯、二硝基甲苯和硝基苯的检测限分别为0.68 ppm、1.68 ppm和2.5 ppm。这项工作为设计和制造具有高性能且便于用户检测痕量NACs的柔性传感器提供了一个候选方案。
