Design and Synthesis of a Triazine-Based sp2 Carbon-Conjugated Covalent Organic Framework for Blue Light Photocatalysis,Small

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Design and Synthesis of a Triazine-Based sp2 Carbon-Conjugated Covalent Organic Framework for Blue Light Photocatalysis
Small ( IF 13.0 ) Pub Date : 2023-05-17 , DOI: 10.1002/smll.202302456
Fulin Zhang ₁ , Xiaoyun Dong ₁ , Yuexin Wang ₁ , Xianjun Lang ₁

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Fully conjugated covalent organic frameworks (COFs) can exhibit great potential in semiconductor photocatalysis. But their syntheses remain elusive due to the low reversibility of vinylene linkage. Herein, by tuning the amount of base and temperature, a novel triazine-based sp² carbon-conjugated COF (TA-sp²c-COF) is successfully constructed over Cs₂CO₃. Besides, the influence of modulating factors on the chemical and optoelectronic properties of TA-sp²c-COF is thoroughly investigated. TA-sp²c-COF adopts an eclipsed AA stacking structure with uniform micropores (1.4 nm). The blue light photocatalysis of the highly crystalline TA-sp²c-COF is established for the selective oxidative coupling of amines with oxygen, and the predominant role of superoxide is identified in forming imines. This work foretells that meticulous modulation of reaction conditions is the key to constructing sp² carbon-conjugated COFs toward solar photocatalysis.

中文翻译：

用于蓝光光催化的三嗪基 sp2 碳共价有机框架的设计与合成

完全共轭的共价有机框架（COF）在半导体光催化方面表现出巨大的潜力。但由于亚乙烯基键的可逆性较低，它们的合成仍然难以捉摸。在此，通过调节碱的量和温度，在Cs ₂ CO ₃上成功构建了一种新型的基于三嗪的sp ² 碳共轭COF（TA-sp ² c-COF）。此外，还深入研究了调节因素对TA-sp ² c-COF化学和光电性能的影响。TA-sp ² c-COF采用重叠的AA堆叠结构，具有均匀的微孔（1.4 nm）。^{高度结晶的 TA-sp 2} c-COF 的蓝光光催化作用被建立用于胺与氧的选择性氧化偶联，并且确定了超氧化物在形成亚胺中的主要作用。^{这项工作预示着反应条件的精细调节是构建 sp 2} 碳共轭 COF 进行太阳能光催化的关键。

更新日期：2023-05-17

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