2021 Fiscal Year Final Research Report
Selectively and environmentally-friendly process advancing on a soft-interface to synthesize electroconductive material
| Project/Area Number |
19K15353
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 27020:Chemical reaction and process system engineering-related
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| Research Institution | Oyama National College of Technology |
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Principal Investigator |
Kashima Keita 小山工業高等専門学校, 物質工学科, 准教授 (90710468)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | ポリアニリン-エメラルジン塩 / ベシクル / AOT / アニリン / p-アミノジフェニルアミン / ラッカーゼ / チロシン / フェノール |
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| Outline of Final Research Achievements |
An industrial laccase-catalyzed synthesis of electro conductive polyaniline in emeraldine salt form (PANI-ES) in the presence of soft-interface was investigated. It was found that vesicles from AOT known as a surfactant well worked as reaction templates. PANI-ES like products with highly stabilized radical cations were obtained from the oxidization of mixture of aniline and its dimer. The presence of AOT vesicles has an insignificant effect on the formation of enzyme-substrate complex during reaction. On the other hand, the interaction between AOT and aniline dimer as a substrate decreased fluidity of soft interface of AOT vesicles remarkably. This trend agreed with the characteristics of reaction products obtained. The interaction between substrate and soft interface would be key factor for the mechanisms on selective synthesis of objective product. In addition, the reaction using tyrosine and phenol were also investigated and the possibility for broad application was found.
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| Free Research Field |
生物化学工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で着目したソフト界面を反応場として導入した酵素反応による導電性ポリアニリンの合成法は、温和なpH条件で化学的酸化剤を用いることなく、室温中で原料を混合するのみの簡便な操作で、目的分子を選択的に合成できる点で、環境適合性に優れた材料合成プロセスとして新規性が高い。特に、酵素として既に工業的な利用に実績のある食品工業用ラッカーゼを選択し、有効性を明らかにした点は、実用的なプロセス構築に有益な知見である。さらに、ソフト界面が反応の選択性を制御する機構を解明するとともに、新規な原料の検討として生体分子群の反応系に可能性を見出した点は、将来的な発展性に富んだ成果として価値の高い成果である。
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