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Fluorescent Paper Strips for Highly Sensitive and Selective Detection of Nitroaromatic Analytes in Water Samples
Author(s) -
Daglar Bihter,
Demirel Gokcen Birlik,
Bayindir Mehmet
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701352
Subject(s) - detection limit , stacking , quenching (fluorescence) , fluorescence , materials science , naked eye , polyaniline , aqueous solution , pyrene , explosive detection , strips , analyte , analytical chemistry (journal) , photochemistry , chemistry , chromatography , explosive material , polymer , optics , organic chemistry , physics , composite material , polymerization
A portable, low‐cost, flexible, sensitive and selective paper‐based sensor was proposed for nitroaromatic explosive detection in water samples. The sensor was designed to achieve π‐π stacking formation between emaraldine base polyaniline (PANI) and pyrene (Py) molecules. This π‐π stacking formation enables a sensitive turn‐off fluorescence quenching under the principle of photo‐induced electron transfer (PET) mechanism. PANI−Py absorbed paper strips were immersed into the aqueous mediums of analytes and the fluorescence quenching was observed under a simple UV lamp by naked‐eye. Paper strips exhibited∼ 96 % quenching efficiency and the limit of detection was calculated about 9.59 ng/ml. Self‐quenching efficiency test showed that the sensor can be used for several weeks under the adequate storing conditions. In addition, experimental findings revealed that the paper‐based PANI−Py strips work with high precision in real‐samples such as tap water with∼ 85 % quenching efficiency. Moreover the reusability investigations showed that PANI−Py paper‐based sensor can be reused 5 times with 54 % sensitivity.