带隙工程的异质结合有机框架,以促进光催化进化
Guanglai Mo1, Yunke Jin1, Yingjia Deng1
1Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, State Key Laboratory of Porous Materials For Separation and Conversion, College of Smart Materials and Future Energy, Fudan University, Shanghai, China.
Angewandte Chemie (International ed. in English)
|February 3, 2026
概括
研究人员通过修改有机建筑单元来设计结有机框架 (HOF),以调整带间隙以增强光催化. 这种分子设计显著提高了HOF中的进化活动.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 有机化学 有机化学
背景情况:
- 调节半导体带结构是光催化剂的关键.
- 结合有机框架 (HOF) 是结构敏感的,这使得带结构工程很困难.
- 现有的HOF往往缺乏优化的电子特性,以实现高效的光催化.
研究的目的:
- 为了合理设计和合成具有可调节带间隙的新型HOF,以提高光催化性能.
- 为基于HOF的光催化剂建立一个可通用的分子设计原则.
- 研究影响光催化演变的结构-性质关系.
主要方法:
- 在HOF-102的基础上合成了三种异构型HOF (HOF-1022,HOF-1022(CH3),HOF-1022(CN)) 使用定制的有机建筑单元 (OBU) 具有不同的替代剂 (H,CH3,CN).
- 采用了适合形状的 ππ 堆叠策略来进行 OBU 整合.
- 以光学吸收,频段间隙和光催化进化活动来表征合成的HOF.
主要成果:
- 在合成的HOF中实现了可调节的带间隙,范围从2.46到1.86 eV.
- 经过DA优化的HOF-1022 ((CN) 显示出最窄的带间隙,增强的框架内电子传输和抑制的电荷重组.
- HOF-1022 ((CN) 显示了168.2 mmol g-1 h-1 的进化率,与HOF-1022 ((CH3) 相比增加了8.5倍,在420 nm时的表面量子产量 (AQY) 为7.3%.
结论:
- 通过合理的OBU设计,成功地在HOF中展示了带隙工程.
- 为开发高性能HOF光催化剂建立了可通用的分子设计策略.
- 开发的HOF显示了高效光催化生产的巨大潜力.
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