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A selective fluorescent resonance energy transfer quenching and resonance light scattering enhancement dual-recognition probe for 2,4,6-trinitrotoluene

Paper ID Volume ID Publish Year Pages File Format Full-Text
27214 44009 2014 7 PDF Available
Title
A selective fluorescent resonance energy transfer quenching and resonance light scattering enhancement dual-recognition probe for 2,4,6-trinitrotoluene
Abstract

•FITC&PEI polymer has been synthesized.•FITC&PEI polymer can sense TNT by FRET quenching and RLS enhancement.•FITC&PEI polymer is well-suited for detecting and distinguishing trace TNT.•Proposed methods have potential help for public safety and society concern.

Fluorescein isothiocyanate (FITC) conjugated to polyethylenimine (PEI) (FITC&PEI) was synthesized and characterized. The nitrogen-containing organic groups played a key role in sensing nitroaromatic compounds that can bind 2,4,6-trinitrotoluene (TNT) to form TNT anions through an acid–base pairing interaction and FITC dye conjugation. The formation of TNT anions efficiently quenched the emission of FITC dye at 516 nm by fluorescent resonance energy transfer and induced the enhancement of a resonance light scattering (RLS) signal. A novel, dual-channel chemosensory FITC&PEI probe was thus constructed. Meanwhile, the FITC&PEI probe also exhibited highly selective fluorescence and RLS responses for TNT over other nitroaromatic compounds. Very good linearity was observed within the ranges of 3.0–150 nM TNT (detection limit down to 0.5 nM and RSD of 5.8%, n = 7) for fluorescence and 1.0–150 nM TNT (detection limit down to 0.2 nM and RSD of 8.4%, n = 7) for RLS. The proposed methods were well-suited for detecting and distinguishing trace amounts of TNT in aqueous solution.

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Keywords
Fluorescence resonance energy transfer (FRET); Resonance light scattering (RLS); Dual-recognition probe; 2,4,6-Trinitrotoluene (TNT); Chemosensor
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A selective fluorescent resonance energy transfer quenching and resonance light scattering enhancement dual-recognition probe for 2,4,6-trinitrotoluene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 278, 15 March 2014, Pages 82–88
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us