title: Highly sensitive detection of nitroaromatic explosives using an electrospun nanofibrous sensor based on a novel fluorescent conjugated polymer.
abstract: 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.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, the College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Long
authors.forename: Haibo
authors.initials: H
authors.lastname: Chen
authors.forename: Huaming
authors.initials: H
authors.lastname: Wang
authors.forename: Zhou
authors.initials: Z
authors.lastname: Peng
authors.forename: Yufei
authors.initials: Y
authors.lastname: Yang
authors.forename: Guoqing
authors.initials: G
authors.lastname: Zhang
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.forename: Jian
authors.initials: J
authors.lastname: Pei
mesh_terms: D055664:Electrochemical Techniques / Q000295:instrumentation; D005456:Fluorescent Dyes / Q000737:chemistry*; D008856:Microscopy, Fluorescence / Q000295:instrumentation; D015394:Molecular Structure; D057139:Nanofibers / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation; D009578:Nitrobenzenes / Q000032:analysis*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D009578:Nitrobenzenes; D011108:Polymers