Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil.
Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A. C. Simões, 57072-970 Maceió, AL, Brazil; Criminalistics Institute of Alagoas, 57020-070, Maceió, AL, Brazil.
Forensic Sci Int. 2021 Dec;329:111056. doi: 10.1016/j.forsciint.2021.111056. Epub 2021 Oct 14.
The preparation of fluorene(bisthiophene)-based fluorescent nanofibers for nitroaromatic explosive detection provides a convenient rapid and low-cost strategy aiming at forensic applications. Polycaprolactone (PCL) and fluorene(bisthiophene) derivative (FBT) nanofibers were obtained by electrospinning technique as a free-standing mat and characterized by SEM, FTIR, thermal analysis and fluorescence spectroscopy. The PCL/FBT nanofibers presented high sensitivity towards 2,4,6-trinitrotoluene (TNT) and picric acid (PA), with fluorescence quenching (turn-off mechanism), and selectivity to another kind of explosives. The free-standing mats were used as a cloth strip that was swiped on surfaces contaminated with TNT traces allowing its visual detection under UV light source. These findings are particularly important for the development of a facile and promising strategy to assembly portable optical devices for nitroaromatic explosive detection.
基于芴（双噻吩）的荧光纳米纤维的制备可用于检测硝基芳香族爆炸物，为法医应用提供了一种方便、快速且低成本的策略。通过静电纺丝技术获得了聚己内酯（PCL）和芴（双噻吩）衍生物（FBT）纳米纤维，并通过 SEM、FTIR、热分析和荧光光谱进行了表征。PCL/FBT 纳米纤维对 2,4,6-三硝基甲苯（TNT）和苦味酸（PA）表现出高灵敏度，具有荧光猝灭（关闭机制），并且对另一种爆炸物具有选择性。这些独立的纤维垫可用作布条，擦拭表面上沾有 TNT 痕迹的地方，然后在紫外光源下进行目视检测。这些发现对于开发一种简便且有前途的策略，用于组装用于检测硝基芳香族爆炸物的便携式光学设备具有重要意义。
