Triazine, possessing planar and fully conjugated attributes, purveys ample space to construct well-defined crystalline polymers like graphic carbon nitrides (g-C₃N₄), covalent triazine frameworks (CTFs), and covalent organic frameworks (COFs). Herein, g-C₃N₄, CTF-1, and TP-COF were successfully synthesized and systematically confirmed by a series of characterizations, aiming at visible light photocatalytic activation of O₂. Compared to CTF-1 and g-C₃N₄, TP-COF was endowed with the best photocatalytic performance by several inherent properties, including a large specific surface area, a suitable bandgap, and superior charge transfer. The blue light-induced selective conversion of organic sulfides has been achieved expeditiously with O₂ over TP-COF photocatalyst. Moreover, rigorous control experiments and in situ electron paramagnetic resonance (EPR) suggest that electron and energy transfer pathways contribute to the selective formation of desired sulfoxides. This work emphasizes that the tailor-made trait of COFs provides an ideal plarform of customizing two-dimensional (2D) photoactive COFs based on triazine for visible light-induced selective chemical transformations.

三嗪具有平面和完全共轭的属性，提供足够的空间来构建定义明确的结晶聚合物，如图形氮化碳 (gC ₃ N ₄ )、共价三嗪骨架 (CTF) 和共价有机骨架 (COF)。在此，gC ₃ N ₄、CTF-1 和TP-COF 被成功合成并通过一系列表征系统地证实，针对O _{2 的}可见光光催化活化。与 CTF-1 和 gC ₃ N _{4 相比}, TP-COF 被赋予了最好的光催化性能，包括大的比表面积、合适的带隙和优异的电荷转移。在 TP-COF 光催化剂上用 O ₂迅速实现了有机硫化物的蓝光诱导的选择性转化。此外，严格的控制实验和原位电子顺磁共振 (EPR) 表明，电子和能量转移途径有助于选择性形成所需的亚砜。这项工作强调，COFs 的定制特性为定制基于三嗪的二维 (2D) 光活性 COFs 提供了一个理想的平台，用于可见光诱导的选择性化学转化。