Sensing of Picric acid through fluorescence studies of PANI-IPN film

  1. Tayyab ali2,
  2. J. Venkata Viswanath 1,4,
  3. N.V. Srinivasa Rao4,
  4. A. Venkataraman1,3,

1 Materials Chemistry Laboratory, Department of Materials Science, Gulbarga University, Kalaburagi-585106 Karnataka, India
2 Walchand Centre for research in nanotechnology & Bionanotechnology (WCRNB), Solapur, Maharashtra, India.
3Department of Chemistry, Gulbarga University, Kalaburagi-585106 Karnataka, India.
4GUK R & D Centre, Premier Explosive limited, Peddakandukur, Nalgonda. Telengana, India.

  1. Corresponding author email

Associate Editor: T. Kaur
Science and Engineering Applications 2017, 2, 121–124. doi:10.26705/SAEA.2017.2.4.121-124
Received 12 Dec 2016, Accepted 2 Feb 2017, Published 2 Feb 2017

Abstract

An interpenetrating polymer network (IPN) film for sensing of Picric acid (PA) is prepared by chemical assembly of polyaniline-polyvinyl alcohol (PANI-PVA) film by casting on a glass substrate. The prepared IPN film and is employed for the detection of a representative nitroaromatic compound (NAC), in the present case, (PA), for both in solution and in vapor phase of the analyte. This molecular design combines the advantages of IPN film based on single layer chemistry and the signal amplifications as effective way to create novel sensing film for the detection of NACs and other high energy materials (HEMs). Significant static fluorescence quenching was observed for the IPN films within a few seconds of treating with PA solutions. The vapour phase detection of PA was observed on IPN films with good response times. Almost linear increase in the sensitivity calculation obtained through the electrical resistivity measurements within 30.0 min is observed. The structural study of the IPN films before and after treatment with PA is studied employing FTIR spectrometer and stereozoom microscope. Fluorescence quenching Experiments on the IPN films showed that these films can be efficiently reused for two successive cycles. The electrical resistivity studies showed the film to sustain the vapour phase detection for a single measurement. The fluorescence studies and the electrical resistivity studies showed that the films are potential candidates for detection of PA vapours.

Keywords: PANI-IPN film; Fluorescence; FTIR, Morphology; Sensing behavior

 
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