アルキル機能化されたレドックス活性分子ペアの間の分子間相互作用を利用して,インターフェイシャル電子転送を強化する

Inseong Cho¹, Mizuho Koshika², Pawel Wagner¹

¹Intelligent Polymer Research Institute and ARC Centre of Excellence for Electromaterials Science , University of Wollongong , New South Wales 2522 , Australia.

Journal of the American Chemical Society

|September 28, 2018

まとめ

レドックス活性分子と媒介体の長いアルキル鎖は驚くほど電子の移転を加速しますこの分子設計戦略は,望ましい隔離効果を克服し,有益な分子間相互作用を通じて電子転送率を高めます.

科学分野:

材料科学
電気化学
写真化学

背景:

電子転送速度を最適化することは,光採集およびリドックス活性システムにとって極めて重要です.
分子構造の変化は電子移転運動を制御する鍵です
電子移転を媒介するアルキル鎖の役割は,まだ完全に理解されていません.

研究の目的:

長いアルキル鎖が電子移転運動に与える影響を定量化する.
コバルトトトリス (ビピリジン) とカルバゾール/チオフェン分子の間の電子移転を調査する.
アルキル鎖がドナーと受容者の間の電子移転を促進するツールであることを証明する.

主な方法:

電子移転のダイナミクスを研究するために,一時的吸収スペクトロスコーピーを用いた.
アルキル鎖を有するまたは無するドナー受容分子の合成と特徴付け.
異なるアルキル鎖の構成下での電子移転の運動分析.

主要な成果:

アルキル鎖が分子または媒介体のみに存在すると,電子の移転がわずかに妨げられました.
アルキル鎖がドナーと受容体分子と媒介体の両方にあったとき,電子転送率は13倍まで増加した.
この増強は,媒介者の接近を促進するアルキル-アルキル鎖の相互作用に起因した.

結論:

長いアルキル鎖は,予期せぬ形でリドックス活性分子と媒介者の間の電子転送率を高めることができます.
電子伝送効率を改善するために,分子間アルキル-アルキル鎖の相互作用を活用することができます.
この発見はエネルギー変換と貯蔵のための効率的な分子システムを設計するための新しい戦略を提供します.

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