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A “turn-off” fluorescent sensor based on electrospun polycaprolactone nanofibers and fluorene(bisthiophene) derivative for nitroaromatic explosive detection
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 electrospinni...
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Published in: | Forensic science international 2021-12, Vol.329, p.111056-111056, Article 111056 |
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Main Authors: | , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | 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.
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•Polymer nanofibers based on poly(caprolactone) and fluorene(bisthiophene) derivative have been successfully prepared.•Fluorescent nanofiber mats are useful as material for nitroaromatic explosives detection.•The strategy consists in fluorescence quenching of PCL/FBT mats after exposure to nitroaromatic explosive residues.•Low-cost and free-standing fluorescent nanofibers formation are some of the advantages of the methodology.•PCL/FBT nanofibers presented high efficiency quenching after interaction with TNT and PA. |
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ISSN: | 0379-0738 1872-6283 |
DOI: | 10.1016/j.forsciint.2021.111056 |