Beijing National Laboratory for Molecular Sciences, the College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Anal Chim Acta. 2012 Sep 26;744:82-91. doi: 10.1016/j.aca.2012.07.028. Epub 2012 Jul 24.
An electrospun nanofibrous explosive sensor was first constructed based on a newly developed fluorescent conjugated polymer P containing heteroatom polycyclic units. Electrospinning by doping polymer P as a fluorescent probe in a polystyrene supporting matrix afforded a fluorescence nanofibrous film with unique porous structures, and effectively avoided the aggregation of polymer P. The novel explosive sensor exhibited stable fluorescence property, satisfactory reversibility with less than 5% loss of signal intensity after four quenching-regeneration cycles, and good reproducibility among three batches with a relative standard deviation of 2.8%. Such fabricated sensor also showed remarkable sensitivity toward a series of trace nitroaromatic explosive vapors, including picric acid (parts-per-trillion level) and 2,4,6-trinitrotoluene vapor (parts-per-billion level), as well as good selectivity with less than 10% response to typical interferents. Therefore, the present strategy extends the application of different kinds of conjugated polymers for the construction of optical chemosensors.
首次基于一种新型含杂原子多环单元的荧光共轭聚合物 P 构建了电纺纳米纤维爆炸物传感器。通过将聚合物 P 掺杂为荧光探针在聚苯乙烯支撑基质中进行电纺，得到具有独特多孔结构的荧光纳米纤维膜，并有效避免了聚合物 P 的聚集。新型爆炸物传感器表现出稳定的荧光性能，令人满意的可重复性，在四个淬火-再生循环后信号强度损失小于 5%，三批之间具有良好的重现性，相对标准偏差为 2.8%。这种制备的传感器对一系列痕量硝 基芳香族爆炸物蒸气也表现出显著的敏感性，包括苦味酸（万亿分之几水平）和 2,4,6-三硝基甲苯蒸气（十亿分之几水平），并且对典型干扰物的响应小于 10%，具有良好的选择性。因此，本策略扩展了不同类型的共轭聚合物在光学化学传感器构建中的应用。
