Electrically conductive and fluorescent poly[1,4-bis(3-alkyl-2- thienyl)phenylenes]: syntheses and preliminary characterization aspects |
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| Affiliation: | 1. Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA;2. Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA;1. Department of Chemistry, University College of Science & Technology, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, India;2. Bio-Organic Chemistry Lab, Department of Chemistry, Visva-Bharati University, Santiniketan 731 235, India;1. N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 630090, Lavrentieva 9, Novosibirsk, Russia;2. Novosibirsk State University, 630090, Pirogova 2, Novosibirsk, Russia;3. International Laser Center, Lomonosov Moscow State University, 119991, Leninskie Gory 1-62, Moscow, Russia;4. Faculty of Physics, Lomonosov Moscow State University, 119991, Leninskie Gory 1-2,Moscow, Russia;5. Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” RAS, 119333, Leninskiy prospect 59, Moscow, Russia;6. Enikolopov Institute of Synthetic Polymeric Materials RAS, 117393, Profsoyuznaya 70, Moscow, Russia;7. Faculty of Chemistry, Lomonosov Moscow State University, 119991, Leninskie Gory 1-3 Moscow, Russia;1. College of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha, 410114, PR China;2. Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha, 410114, PR China |
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| Abstract: | A series of polymers containing alternating phenylene and symmetrically substituted bithiophene repeat units have been synthesized and characterized using UV-Vis absorption spectroscopy, fluorescence emission spectroscopy, conductivity measurement and thermal analyses. The results reveal that the polymers have a bandgap energy of 2.5 eV and a fluorescence quantum yield of up to 26% with respect to quinine sulfate. The polymers show a maximum conductivity of 0.2 S cm−1 upon doping with I2 and display good thermal stability in both neutral and doped states. The influence of alkyl chain size on conductivity, spectral behavior and thermal stability is discussed. |
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