Investigation of Reaction Mechanism for Oxidation Coupling Reaction of 3-Hexylthiophene using X-Ray Absorption Fine Structure (XAFS)

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  • HIRAI Tomoyasu
    Graduate School of Engineering, Kyushu University Institute for Materials Chemistry and Engineering, Kyushu University International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
  • SATO Masanao
    Graduate School of Engineering, Kyushu University
  • NAGAE Yusuke
    Graduate School of Engineering, Kyushu University
  • KAMITANI Kazutaka
    Institute for Materials Chemistry and Engineering, Kyushu University
  • KONISHI Yuko
    Institute for Materials Chemistry and Engineering, Kyushu University
  • YOKOMACHI Kazutoshi
    Institute for Materials Chemistry and Engineering, Kyushu University
  • NISHIBORI Maiko
    Faculty of Engineering Science, Kyushu University Research Center for Synchrotron Light Applications, Kyushu University
  • TAKAHARA Atsushi
    Graduate School of Engineering, Kyushu University Institute for Materials Chemistry and Engineering, Kyushu University International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University Research Center for Synchrotron Light Applications, Kyushu University

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Other Title
  • X線吸収微細構造（XAFS）測定に基づく3-ヘキシルチオフェン酸化カップリング重合機構の解明
  • Xセン キュウシュウ ビサイ コウゾウ(XAFS)ソクテイ ニ モトズク 3-ヘキシルチオフェン サンカ カップリング ジュウゴウ キコウ ノ カイメイ

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<p>Polymerization of 3-hexylthiophene (3HT) with FeCl3 is simple, efficient, and has been widely adopted for both laboratory and industrial scale production purpose. However, there remains considerable debate regarding the polymerization mechanism. We have used partial fluorescence yield X-ray absorption fine structure (XAFS) techniques to monitor the change in valance state of the solid FeCl3 particles in CHCl3 and hexane. The FeCl3 acts as a catalyst when the reaction is performed in CHCl3, but behaves as an oxidant in hexane. The catalytic behavior is attributed to the decomposition of CHCl3, which has been previously reported to oxidize Fe2+ to Fe3+. This is the first report on the catalytic role of FeCl3 during the polymerization of 3HT in CHCl3.</p>

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