在2D共价有机框架中通过拓聚合构建层间联结链接
Yuhao Zhu1, Pengpeng Shao1, Linyu Hu1
1Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
Journal of the American Chemical Society
|May 19, 2021
概括
研究人员开发了一种新方法,在二维共价有机框架 (COF) 中创建层间的联结. 这种层间聚合增强了电子特性和光电子和催化中的应用.
科学领域:
- 材料科学
- 聚合物化学
- 纳米技术
背景情况:
- 二维共价有机框架 (2D COF) 是具有层次结构的晶体聚合物材料.
- 2D COF 中的层间相互作用通常是范德瓦尔斯力,限制了层间的连接.
- 构建层间的结合路径对于推进光电子应用至关重要.
研究的目的:
- 为二维COF开发一种新的层间拓聚合策略.
- 通过固态加热,在二维COF层之间引入结合的enyne链.
- 调查层间对对二维COF的光电子和催化性能的影响.
主要方法:
- 三种不同的2DCOF (TAPFY-COF,TAPB-COF,TAPP-COF) 的固态加热,其中包含二乙烯柱状阵列.
- 使用确认保持高晶度的技术,对得到的聚合COF (COF-P) 进行表征.
- 对修改后的COF的光电子特性 (导电性,吸收带,带间隙) 和催化性能 (光热,光声,氧减) 的评估.
主要成果:
- 通过层间拓聚合,成功地将二乙烯单元转化为联的enyne链.
- 由此产生的COF-P材料保持了高晶度,吸收波段扩大,波段间隙缩小.
- 显著提高电导率 (TAPFY-COF高达2.8×10−4 S/cm),改善TAPP-COF的光热,光声和氧降解催化作用.
结论:
- 层间拓聚合是一种有效的策略,可以在二维COF中创建结合路径.
- 引入结合的enyne链增强了电荷载体的移位,并改善了二维COF的光电子和催化功能.
- 这种方法为设计用于能源和电子应用的先进二维COF材料开辟了新的途径.
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