半導体2Dトリアジン色合いの共性有機フレームワークで,オレフィン結合が置換されていない
Shice Wei1, Fan Zhang1, Wenbei Zhang1
1School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites , Shanghai Jiao Tong University , Shanghai 200240 , China.
Journal of the American Chemical Society
|August 21, 2019
まとめ
研究者はノエベナゲル凝縮を用いた新しい2D共性有機フレームワーク (COF) を開発した. これらの sp2 炭素結合COFは,効率的な光電化学アプリケーションと光触媒的水素生成の有望性を示しています.
科学分野:
- 材料科学
- 有機化学
- ナノテクノロジー
背景:
- sp2-炭素結合を確立することは,有機半導体にとって極めて重要です.
- 2D π 拡張フレームワークの溶液ベースの合成は,C−C 結合の形成が逆行性が低いため,依然として困難である.
研究 の 目的:
- 新しい2D共性有機フレームワーク (COF) の合成のためのノヴェナゲル凝縮アプローチを提示する.
- sp2炭素結合COFの特性と応用,特に光電極と光触媒の研究.
主な方法:
- 2,4,6-トリメチル-1,3,5-トリアジン単体によるノイヴェナゲルの凝縮により2つの新しい2DCOFを合成した.
- COFの構造,電子特性,形状を特徴づけました.
- 光電流測定のための薄膜光電極を製造し,光触媒的な水素生成における性能を評価した.
主要な成果:
- ハチミツのような構造を持つ sp2 炭素結合トリアジンコアの2Dシートを達成した.
- 拡張された π 移転,調整可能なエネルギーレベル,高表面積,および化学的安定性を実証した.
- COFベースの光電極は ~45 μA cm−2までの光電流と急速な電荷移転を示し,イミン結合のCOFを上回った.
- COFは,水分裂から可視光駆動光触媒水素生成の適用性を示した.
結論:
- ノーヴェナゲルの凝縮は,sp2炭素結合2DCOFへの効果的な経路を提供します.
- これらの新しいCOFは,光電化学装置と光触媒に望ましい性質を持っています.
- 開発されたCOFベースの光電極は,水分裂アプリケーションの性能を向上させます.
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