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      Highly fluorescent pyrene-functional polystyrene copolymer nanofibers for enhanced sensing performance of TNT

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      Author
      Senthamizhan, A.
      Celebioglu A.
      Bayir, S.
      Gorur, M.
      Doganci, E.
      Yilmaz, F.
      Uyar, Tamer
      Date
      2015
      Source Title
      ACS Applied Materials and Interfaces
      Print ISSN
      1944-8244
      Publisher
      American Chemical Society
      Volume
      7
      Issue
      38
      Pages
      21038 - 21046
      Language
      English
      Type
      Article
      Item Usage Stats
      132
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      176
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      Abstract
      A pyrene-functional polystyrene copolymer was prepared via 1,3-dipolar cycloaddition reaction (Sharpless-type click recation) between azide-functional styrene copolymer and 1-ethynylpyrene. Subsequently, nanofibers of pyrene-functional polystyrene copolymer were obtained by using electrospinning technique. The nanofibers thus obtained, found to preserve their parent fluorescence nature, confirmed the avoidance of aggregation during fiber formation. The trace detection of trinitrotoluene (TNT) in water with a detection limit of 5 nM was demonstrated, which is much lower than the maximum allowable limit set by the U.S. Environmental Protection Agency. Interestingly, the sensing performance was found to be selective toward TNT in water, even in the presence of higher concentrations of toxic metal pollutants such as Cd2+, Co2+, Cu2+, and Hg2+. The enhanced sensing performance was found to be due to the enlarged contact area and intrinsic nanoporous fiber morphology. Effortlessly, the visual colorimetric sensing performance can be seen by naked eye with a color change in a response time of few seconds. Furthermore, vapor-phase detection of TNT was studied, and the results are discussed herein. In terms of practical application, electrospun nanofibrous web of pyrene-functional polystyrene copolymer has various salient features including flexibility, reproducibility, and ease of use, and visual outputs increase their value and add to their advantage.
      Keywords
      Colorimetric detection
      Nanofibers
      Pyrene
      TNT
      Toxic metals
      Cadmium
      Color
      Colorimetry
      Cycloaddition
      Environmental Protection Agency
      Fluorescence
      Mercury (metal)
      Nanofibers
      Polystyrenes
      Pyrene
      Styrene
      Trace analysis
      Water pollution
      1 ,3-Dipolarcycloaddition
      Colorimetric detection
      Colorimetric sensing
      Electrospinning techniques
      Polystyrene copolymer
      TNT
      Toxic metals
      U.S. Environmental Protection Agency
      Explosives detection
      Permalink
      http://hdl.handle.net/11693/20926
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/acsami.5b07184
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
      • Nanotechnology Research Center (NANOTAM) 1006
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