サイドチェーン地域化学が,高機動性,全ドナーポリマーのトランジスタ性能に及ぼす影響
Zhuping Fei1, Pichaya Pattanasattayavong, Yang Han
1Department of Chemistry and Centre for Plastic Electronics, Imperial College London , Exhibition Road, London SW7 2AZ, U.K.
Journal of the American Chemical Society
|October 11, 2014
まとめ
研究者らは,3つのポリチオフェン同位体を合成し,サイドチェーンの地域化学を変化させ,その光電子特性と集積に大きく影響を与えました. 最も長い結合長さのポリマーは,有機電子工学にとって決定的な,最も高いフィールド効果の可動性を達成しました.
科学分野:
- 材料科学 材料科学とは
- オーガニック・エレクトロニクス
- ポリマー化学のポリマー化学について
背景:
- ポリチオフェンは,電子アプリケーションの重要な有機半導体です.
- ポリマーの構造を制御することは,光電子特性調節の鍵です.
- サイドチェーンのレジオケミストリーは,ポリマーの骨格構造と性能に影響します.
研究 の 目的:
- 新規のポリチオフェン同位体を合成し,特徴づけること.
- サイドチェーン地域化学が光電子特性に与える影響を調査する.
- 構造的差異とポリマー集積とフィールド効果の移動性を相関させる.
主な方法:
- 3つのポリチオフェンイソマーの合成で,サイドチェーンが異なる地域化学.
- ポリマーの性質のスペクトル学的および電気化学的特徴付け.
- UV-Visスペクトロスコーピーを用いて溶液中のポリマー集積の分析.
- ポリマーベースのトランジスタにおけるフィールド効果のモビリティの測定.
主要な成果:
- サイドチェーン地域化学は,光電子特性と溶液集積を大幅に変化させます.
- 背骨のトルションの差異は,観察された性質の変動と相関しています.
- 最も有効な結合長を持つポリマーは,最も高いフィールド効果の可動性を示した.
- ピークフィールド・エフェクト・モビリティー値は,最大4.6cmまで達した (((2) V(-1) s(1).
結論:
- サイドチェーン地域化学は,ポリチオフェン半導体の重要な設計パラメータです.
- 構造制御を通じてコンジュガーションの長さを最適化することで,電荷輸送が向上します.
- これらの発見は,高性能の有機電子材料の設計のための洞察を提供します.
関連する概念動画
Polymer Classification: Stereospecificity
2.3K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.3K
Cationic Chain-Growth Polymerization: Mechanism
2.1K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.1K
Polymer Classification: Architecture
2.9K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.9K
Anionic Chain-Growth Polymerization: Overview
1.8K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
1.8K
Anionic Chain-Growth Polymerization: Mechanism
1.7K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
1.7K
Site-Targeted Drug Delivery Systems: Polymeric Carriers
146
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
146


