通过简单的链接转换,通过具有优越的光催化性质,构建亚醇链接的共价有机框架
Shuailong Yang1,2, Ziao Chen1, Lei Zou1,2
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 21, 2023
概括
研究人员开发了一种新方法来创建稳定,结合的共价有机框架 (COF). 这些与硫醇相关的COF显示出增强的化学稳定性和在光催化过程中提高的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 纳米技术纳米技术
背景情况:
- 共价有机框架 (COF) 对光电子和光催化非常重要.
- 为稳定,结合的COF开发简单的合成路径仍然是一个挑战.
研究的目的:
- 建立一种新型的合成策略,用于与亚二醇相关的COF.
- 调查亚二醇链接对COF特性和性能的影响.
主要方法:
- 使用Lawesson的试剂 (LR) 进行N-酸醇键的化,循环化和氧化等链接转换策略.
- 由此产生的与亚醇相关的COF (TDA-COF) 对于孔隙性,结晶性和化学稳定性的表征.
- 关于电子性质和光催化活性,对TDA-COF和与N-酸相关的COF (NAH-COF) 的比较分析.
主要成果:
- 成功合成晶体TDA-COF,保持多孔性和增强化学稳定性.
- 与NAH-COF相比,TDA-COF表现出较低的激子结合能量和改善的π电子移位.
- 与NAH-COF (7.5 mmol g-1) 相比,TDA-COF显示了显著更高的光催化H2演化率 (5小时内61.3 mmol g-1),比NAH-COF (7.5 mmol g-1) 高.
结论:
- 新的链接转换策略可以轻松访问稳定,结合的TDA-COF.
- 亚二醇连接增强了COF的电子特性和光催化性能.
- 开发的TDA-COF显示了光电子和光催化应用的巨大潜力.
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