Unique optical and electrochemical properties of π-conjugated electrically conducting copolymers consisting of electron-withdrawing pyridine units and electron-donating thiophene units

Authors:
  • ZZZhen-Hua Zhou
    Zhen-Hua Zhou
  • TMTsukasa Maruyama
    Tsukasa Maruyama
  • TKTakaki Kanbara
    Takaki Kanbara
  • TITomiki Ikeda
    Tomiki Ikeda
  • KIKunihiro Ichimura
    Kunihiro Ichimura
  • TYTakakazu Yamamoto
    Takakazu Yamamoto
  • KTKoichi Tokuda
    Koichi Tokuda

Abstract
Electrically conducting π-conjugated copolymers consisting of π-excessive thiophene-2,5-diyl and π-deficient pyridine-2,5-diyl monomer units show a unique cyclic voltammogram with an unusually large potential difference between the doping and the undoping peaks, and their electronic and fluorescence spectra support occurrence of intramolecular charge transfer showing absorption and fluorescence peaks at lower energy compared with those of the corresponding homopolymers.

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