Fluorescent Paper Strips for Highly Sensitive and Selective Detection of Nitroaromatic Analytes in Water Samples


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Daglar B., Demirel G., BAYINDIR M.

ChemistrySelect, vol.2, no.25, pp.7735-7740, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2 Issue: 25
  • Publication Date: 2017
  • Doi Number: 10.1002/slct.201701352
  • Journal Name: ChemistrySelect
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.7735-7740
  • Keywords: Fluorescent sensor, Paper-based, PANI, Pyrene, TNT, EXPLOSIVES DETECTION, POLYANILINE, CHEMOSENSORS, SENSOR, TNT, NANOFIBERS, LEVEL, FILMS, 2,4,6-TRINITROTOLUENE, ELECTRODE
  • Ankara Haci Bayram Veli University Affiliated: No

Abstract

© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, WeinheimA 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.