A highly sensitive fluorescent sensor based on small molecules doped in electrospun nanofibers: detection of explosives as well as color modulation
A highly sensitive fluorescent sensor based on small molecules doped in electrospun nanofibers: detection of explosives as well as color modulation
复制标题
基于电纺纳米纤维中掺杂小分子的高灵敏度荧光传感器：爆炸物检测以及颜色调制
DOI：
10.1039/c5tc00819k
复制
发表时间：
2015
影响因子：
6.4
通讯作者：
Huang Wei
中科院分区：
文献类型：
--
作者：
Xue Wei;Zhang Yang;Duan Juanjuan;Liu Dong;Ma Yawei;Shi Naien;Chen Shufen;Xie Linghai;Qian Yan;Huang Wei
荧光聚合物纳米纤维在纳米光子学、纳米光电子学、化学传感器和发光二极管等领域有着广泛的应用。将小荧光团掺杂到低成本聚合物中是生产具有成本效益和高性能光学材料的一种经过验证的替代途径。为了深入研究小分子掺杂聚合物体系的电化学物理过程，获得高灵敏、低成本的爆炸荧光传感器，以PEO/MePyCz（聚氧化乙烯/4-（2-（2-（2-甲氧基乙氧基）-9-（芘-1-基）-9 H-carbazole）复合纳米纤维为基体，合成了一种新型的高灵敏、低成本的硝基化合物传感器.它对DNT蒸气表现出快速响应和高猝灭效率，这可能归因于MePyCz在PEO中的激子迁移的改善以及电子转移的大驱动力和纳米纤维结构。此外，它促进了聚合物纤维基质中的荧光共振能量转移过程与2-（噻吩-2-基）-芴-9-酮的绿色发光材料。该传感复合纳米纤维膜具有良好的灵敏度和选择性，可用于便携式爆炸物探测器。
Fluorescent polymer nanofibers have wide applications in the fields of nano-photonics, nano-optoelectronics, chemical sensors and light-emitting diodes. The doping of small fluorophores into low-cost polymers is a proven alternative route to produce cost-effective and high-performance optical materials. In order to gain deep insight into the photophysical processes of small molecule-doped polymer nanofiber systems and obtain highly sensitive and cost-effective explosive fluorescent sensors, a new type of highly sensitive low-cost sensor for nitro-compounds was synthesized based on PEO/MePyCz (polyethylene oxide/4-(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)-9-(pyren-1-yl)-9H-carbazole) composite nanofibers. It exhibited fast response and high quenching efficiency towards DNT vapor, which may be attributed to an improved exciton migration of MePyCz in PEO in addition to the large driving force of the electron transfer and the nanofibrous structures. Additionally, it promoted a fluorescence resonance energy transfer process in the polymer fibrous matrix with a green-emitting material of 2-(thiophen-2-yl)-fluoren-9-one. The sensing composite nanofibrous film had good sensitivity and selectivity and might be constructed into a portable detector for explosives.