DNA内に組み立てられたペリレンダイミド染色体の上に積み重ねられた電荷移位によって強化された光電流の生成
Tadao Takada1, Akane Ashida, Mitsunobu Nakamura
1Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo , 2167 Shosha, Himeji, Hyogo 671-2280, Japan.
Journal of the American Chemical Society
|May 3, 2014
まとめ
DNAのπ-スタックに堆積されたペリレンディイミド (PDI) 分子は,光電流を著しく高めます. この強化された生成は,PDIダイマーとトリマーの長時間充電移位から生じ,これは効率的な充電分離に不可欠です.
科学分野:
- 分子電子は分子電子である.
- 有機半導体 オーガニック半導体
- 超分子化学とは
背景:
- ペリレンディイミド (PDI) 分子は,有機電子学の重要な染色体である.
- 分子アセンブリにおける電荷伝送ダイナミクスの理解は,デバイスの効率化に不可欠です.
研究 の 目的:
- DNAテンプレートPDI πスタックで光電流の発生と電荷の移転を調査する.
- 荷電移位とキャリア寿命における分子堆積の役割を解明する.
主な方法:
- DNA-PDI πスタック配列の製造.
- フォト電流測定 フォト電流測定
- フェムト秒の時間解像度を持つ一時吸収スペクトロスコーピー.
主要な成果:
- PDIダイマーとトリマーの対面スタッキングは,モノマーと比較して,光電流を大幅に強化しました.
- 積み重ねられたPDIの興奮は,電荷の移転を示唆する広範囲の一時的な吸収帯を生じさせた.
- PDIダイマー/トリマーにおける充電移転寿命 (約. 1 ns) は,単体よりもかなり長かった.
結論:
- Cofacial PDIがDNA配列に積み重なると,電荷の移位が促進される.
- 積み重ねられたPDIにおける電荷移位寿命の増加は,光電流生成の強化と直接関連しています.
- DNAテンプレートによるπスタックは,効率的な有機電子材料のための有望な戦略を提供します.
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