同体双孔二维共价有机框架
Boxu Feng1, Xiyu Chen2, Pu Yan3
1The Soft2D Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Journal of the American Chemical Society
|November 16, 2023
概括
研究人员合成了具有kagome (kgm) 拓的新型二维 (2D) 共价有机框架 (COF). 基于青的COF具有创纪录的低频段间隙和在NO2气体传感方面卓越的性能.
科学领域:
- 材料科学
- 化学学
- 纳米技术
背景情况:
- 具有层次孔隙性的二维 (2D) 共价有机框架 (COF) 是有前途的材料.
- 具有kagome (kgm) 拓的二维COF具有独特的光电子特性,但难以合成.
- 与正方形格子拓的竞争阻碍了kgm的COF合成.
研究的目的:
- 开发一种用于合成具有kgm拓的双孔二维COF的新型几何策略.
- 调查这些COF的结构性质相关性,特别关注异构构件的作用.
- 探索这些COF作为气体传感应用的电极材料的潜力.
主要方法:
- 使用一种新的几何策略,采用四臂烯基和青基异构单体.
- 合成了两种具有kgm拓的同位素双孔2DCOF.
- 描述了COF,并评估了基于青的COF (COF-Az) 作为气体传感器中的电极材料.
主要成果:
- 成功合成了两种具有kgm拓的同位素双孔2DCOF.
- 基于青的COF (COF-Az) 呈现了1.37 eV的狭窄带间隙,这是报告的双孔二维COF中最低的.
- COF-Az对NO2具有很高的选择性,反应率为58.7% (10ppmNO2),恢复速度快 (72秒),稳定性为10周,耐湿度为80%.
结论:
- 这种新型的几何策略使得2DCOF能够以同位数kgm拓进行合成.
- 青的高二极矩显著提高了伊米连接的灵敏度,提高了气体传感器的性能.
- 基于青的二维COF为研究结构与性能关系和开发先进的气体传感器提供了一个有前途的平台.
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