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      Optical and electronic properties of fluorene-based copolymers and their sensory applications

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      Author
      Ibrahimova, V.
      Kocak, M. E.
      Önal, A. M.
      Tuncel, D.
      Date
      2013
      Source Title
      Journal of Polymer Science, Part A: Polymer Chemistry
      Print ISSN
      0887-624X
      Electronic ISSN
      1099-0518
      Publisher
      John Wiley & Sons, Inc.
      Volume
      51
      Issue
      4
      Pages
      815 - 823
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      A series of novel, fluorene-based conjugated copolymers, poly[(9,9-bis{propenyl}-9H-fluorene)-co-(9,9-dihexyl9H-fluorene)] (P1), poly[(9,9-bis{carboxymethylsulfonyl-propyl}- fluorenyl-2,7-diyl)-co-(9,9-dihexyl-9H-fluorene)] (P2) and poly[(9,9- dihexylfluorene)-co-alt-(9,9-bis-(6-azidohexyl)fluorene)] (P3), are synthesized by Suzuki coupling reactions and their electrochemical properties, in the form of films, are investigated using cyclic voltammetry. The results reveal that the polymer films exhibit electrochromic properties with a pseudo-reversible redox behavior; transparent in the neutral state and dark violet in the oxidized state. Among the three polymers, P2 possesses the shortest response time and the highest coloration efficiency value. These polymers emit blue light with a band gap value of around 2.9 eV and have high fluorescent quantum yields. Their metal ion sensory abilities are also investigated by titrating them with a number of different transition metal ions; all of these polymers exhibit a higher selectivity toward Fe3þ ions than the other ions tested with Stern–Volmer constants of 4.41 106 M1 , 3.28 107 M1 , 1.25 106 M1 , and 6.56 106 M1 for P1, P2, water soluble version of P2 (P2S) and P3, respectively.
      Keywords
      Electrochromism
      Fluorene-based polymers
      Fluorescence
      Ion sensing
      Permalink
      http://hdl.handle.net/11693/21073
      Published Version (Please cite this version)
      http://dx.doi.org/10.1002/pola.26454
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      • Department of Chemistry 594
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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