レジオランダムおよびレジオレギュラーポリ ((3-オクチルフラン) の合成と特徴付け
J K Politis1, J C Nemes, M D Curtis
1Willard H. Dow Laboratory, Department of Chemistry, The University of Michigan, Ann Arbor, MI 48109-1055, USA.
Journal of the American Chemical Society
|July 18, 2001
まとめ
この研究では,異なる領域の規則性を有するポリー ((3-オクチルフラン) を合成し,より高い領域の規則性がドーピングフィルムの結晶性と電気伝導性を高めることを発見しました. これらの材料は,調節可能な電子特性と熱安定性により,電子アプリケーションの可能性を示しています.
科学分野:
- マテリアルサイエンス 材料科学
- ポリマー化学のポリマー化学について
- オーガニック・エレクトロニクス
背景:
- ポリー ((3-オクチルフラン) (P3OF) は,有機エレクトロニクスにおける潜在的な応用を持つ結合ポリマーである.
- 地域の規則性は,結合ポリマーの性質に大きく影響する.
研究 の 目的:
- 異なる地域における規則性 (95%,75%,50%のHT含有量) を有するポリオチルフーランを合成し,特徴づけること.
- P3OFの構造,光学,電子,熱特性に対する地域規則性の影響を調査する.
主な方法:
- P3OFの合成,制御された地域規則性.
- 構造分析のためのX線 difraktion.構造分析のためのX線 difraktion.
- 光学特性を調べるためのUV-VISスペクトロスコーピー.
- 電気化学的性質のサイクル電圧計.
- ドーピングフィルムの電気伝導性の測定.
- 熱安定性のための熱重力測定分析.
主要な成果:
- P3OF-95は高結晶性を示し,ラメラ間隔は22.1 Å,π スタッキングは3.81 Åである.
- UV-VISスペクトロスコーピーは,P3OF-95における集積を示し,πシステム相互作用によるDavydov分裂 (0.15 eV) を示した.
- P3OFは0.32Vで反転的に酸化し,1.15Vで不可逆的な酸化をします.
- ヨウ素を添加したP3OF-95およびP3OF-75フィルムは,それぞれ10−2 S/cmおよび10−7 S/cmの伝導性を達成した.
- 推定伝導帯のギャップはP3OF-95で0.34 eV,P3OF-75.0で0.9 eVであった.
- P3OFの試料は,窒素で380°Cまで熱的に安定しているが,酸化に敏感である.
結論:
- P3OFのより高い地域規則性は,ドーピング時に結晶性の増加と電気伝導性の改善につながります.
- 観測された光学的および電子的性質は,πシステムスタッキングの程度と強く関連しています.
- P3OFは,調節可能な電子特性と良好な熱安定性を示しており,有機電子機器の有望な材料となっています.
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