Investigation of reaction mechanism for oxidation coupling reaction of 3-hexylthiophene using X-ray absorption fine structure (XAFS)
Creators
- 1. Kyushu University, Graduate School of Engineering, Fukuoka (Japan)
- 2. Kyushu University, Institute for Materials Chemistry and Engineering, Fukuoka (Japan)
- 3. Kyushu University, Faculty of Engineering Sciences, Fukuoka (Japan)
Description
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. (author)
Abstract (Japanese)
塩化鉄微粒子を用いた3-ヘキシルチオフェン(3HT)の酸化カップリング重合は他の重合法と比較して極めて簡便であるため,学術的のみならず工業的な応用も期待される重合法である.しかしながら,磁性を示すFeCl3を含有する反応系であるために,核磁気共鳴に基づく反応追跡を行うことができずその反応機構の解明には未だに至っていない.本研究ではX線吸収微細構造(XAFS)測定に基づき反応追跡を分光学的に行った.FeCl3は従来提案されている酸化剤としてのみならず,溶媒に依存して触媒として機能することが明らかとなった.また,微細空孔を有する材料中で酸化カップリング重合を行うことにより,無溶媒で高分子量からなる直鎖高分子を調製可能であることを見出した.(著者)Additional details
Additional titles
- Original title (Japanese)
- 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
Publishing Information
- Journal Title
- X-sen Bunseki No Shinpo
- Journal Volume
- 48
- Series
- 雑誌名:X線分析の進歩
- Journal Page Range
- p. 203-214
- ISSN
- 0911-7806
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 54097308
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ABSORPTION SPECTROSCOPY; COUPLING; CROSS-LINKING; FOURIER TRANSFORM SPECTROMETERS; METHYL CHLORIDE; NUCLEAR MAGNETIC RESONANCE; OXIDATION; STOICHIOMETRY; THERMAL GRAVIMETRIC ANALYSIS; X-RAY SPECTROSCOPY; ZEOLITES
- Descriptors DEC
- CHEMICAL ANALYSIS; CHEMICAL REACTIONS; CHLORINATED ALIPHATIC HYDROCARBONS; GRAVIMETRIC ANALYSIS; HALOGENATED ALIPHATIC HYDROCARBONS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MAGNETIC RESONANCE; MATERIALS; MEASURING INSTRUMENTS; MINERALS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; POLYMERIZATION; QUANTITATIVE CHEMICAL ANALYSIS; RESONANCE; SILICATE MINERALS; SPECTROMETERS; SPECTROSCOPY; THERMAL ANALYSIS
Optional Information
- Notes
- 22 refs., 7 figs., 2 tabs.