メタル・オーガニック・フレームワークでのエネルギー輸送は,ステップ・バイ・ステップ・ホッピングを超えています
Qiongqiong Zhang1, Cankun Zhang1, Lingyun Cao1
1Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, PR China.
Journal of the American Chemical Society
|March 27, 2016
まとめ
メタル・オーガニック・フレームワーク (MOF) のシングレットエクシトンの移動は,近隣のジャンプよりも長距離のエネルギー転送によってよりよく説明される. この発見は,MOFで効率的なエネルギー輸送ネットワークを設計するための新しい洞察を提供します.
科学分野:
- 材料科学
- 写真化学
- 超分子化学
背景:
- 光を集める部品を備えた金属有機フレームワークは 自然光合成を模倣する.
- MOFにおけるエクシトン輸送は,通常,近隣ジャンプを用いてモデル化される.
- この近隣近似はトリプレット状態には適しているが,シングレットエクシトンには適していない.
研究 の 目的:
- MOFにおけるシングレットエクシトンの移動を調査する.
- シングレットエクシトンの最寄りのジャンプモデルの適用性を評価する.
- MOFベースの光収集システムのエネルギー転送メカニズムを理解する.
主な方法:
- トルクセン由来リガンドと亜鉛ノードを使用して2つのMOFの製造.
- MOFフレームワークからクマリンプローブへのエネルギー転送を監視する.
- シングレットエクシトンの移動速度と拡散度を測定する.
主要な成果:
- MOFにおけるシングレットエクシトンの移動は,最も近い隣人を超える長距離のエネルギー転送を含みます.
- 観測された拡散度は 1.8 × 10(-2) cm(2) /sと 2.3 × 10(-2) cm(2) /sである.
- 遠距離のエネルギー輸送は,エネルギー輸送全体の67%を占めています.
結論:
- 最近隣のジャンプモデルは,MOFにおけるシングレットエクシトン移動を記述するのに不十分である.
- フォースター共鳴エネルギー伝送 (FRET) と長距離ジャンプはシングレットエクシトン伝送に不可欠である.
- この研究は,MOFにおける効率的なエネルギー輸送ネットワークの設計のための新しい視点を提供します.
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