基于聚氟乙烯负载四芳基乙烯纳米纤维膜的爆炸物荧光检测

以聚合物纤维负载荧光小分子实现对爆炸物的高灵敏度检测是当前研究的热点之一.本文通过静电纺丝制备了系列聚(偏二氟乙烯-co-六氟丙烯)纤维,当该纤维掺入一定浓度的有机荧光小分子,即双(9-芳胺代芴)联四苯乙烯(TPE-2p TPA),具有聚集诱导增强发光特性.本文研究了复合纤维的表面形貌特征和光物理性能,并应用于荧光化学传感器,对以苦味酸为代表的含氮类爆炸性化合物进行了检查.结果表明,该聚合物复合纤维具有超高的荧光检测灵敏度,可以实现对硝基化合物的超灵敏检测,且具有良好的可重复性,对苦味酸溶液检测可重复利用达9次以上,检测极限达到了10-17g/m L,而对其他含氮类化合物如硝基苯、二硝基苯甲酸也表现出一定的检测特性.同时,在结合实验数据的基础上,我们对检测机理进行了探讨.本研究为爆炸性化合物的选择性检测和高灵敏性检测提供了一种便捷的方法,拓展了荧光传感器的学科内涵.

Poly(vinylidene fluoride-hexafluoropropylene) nanofibers doped with tetraphenylethene derivative as fluorescent detection for explosive

In this article,a series of poly(vinylidene fluoride-hexafluoropropylene)nanofibers doped with tetraphenylethene derivative(TPE-2 p TPA)were fabricated through electrospinning,and their morphologies and photophysical properties were characterized.In fluorescent detection for nitro compounds,the prepared materials were highly sensitive to picric acid with very low detection limit of 10-17 g/m L in solution and quenching efficiency of46.75%.Parallel experiments were conducted to detect the common nitro compounds and solvent,and the possible detection mechanism was proposed and discussed.This work provides an alternative and effective method to fabricate a kind of fluorescent nanofibers through simple doping fluorescent small molecule of TPE derivatives into polymer matrix toward the detection of picric acid with high sensitivity and selectivity.