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诱导的电荷补偿效应,以促进光催化水分解在共价有机框架中

Lei Zou^1,2, Duanhui Si^1,2, Shuailong Yang^1,2

¹State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China.

Angewandte Chemie (International ed. in English)

|December 4, 2024

概括

设计具有增强电子脱的共价有机框架 (COF) 可以促进光催化水分裂. 在-氨酸COF中,一种新的[3,2-b]烯连接剂显著提高了的演化效率.

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
化学工程是化学工程的重要组成部分.

背景情况:

基于伊胺的共价有机框架 (COF) 显示了光催化水分裂的潜力.
性能受限于电荷分离效率低下,这是由于电子在极性 imine 键中定位.

研究的目的:

优化基于 imine 的 COF 中的电子移位,以改善光催化水分裂.
调查电子捐赠和提取连接器对电荷分离和催化活性的影响.

主要方法:

合成的 - 氨酸COF与[3,2-b]烯 (电子捐赠) 和氨酸 (电子提取) 连接器.
调查了对近距离联系的收费补偿影响.
在可见光下评估光催化分水活动.

主要成果:

带有硫[3,2-b]硫连接器的 ZnP-Tt COF 显示了显著减少的电子定位.
这便于在平面内进行电荷分离和在平面外进行电荷转移.
与ZnP-Pz变体 (44288±2280μmol g-1在4小时内) 相比,ZnP-Tt在进化中增加了10倍.

结论:

通过电子捐赠连接器实现电荷补偿效应是一种可行的策略,可以增强基于 imine 的 COF 中的电荷分离.
这种方法大大提高了光催化分水性能.
为能源应用中先进的COF材料提供了新的设计原则.

关键词:

共价有机框架是共价有机框架.收费补偿收费补偿收费补偿收费补偿电子亲和力是一种电子亲和力.这是光催化剂.水的分裂是水的分裂.

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