Two-dimensional (2D) metallo-covalent organic frameworks (MCOFs) have been regarded as an interesting new class of photoactive materials due to their superior thermal and chemical stability. Herein, we reported a heterogeneous metallaphotocatalyst Ru-COF which was prepared by using an sp² carbon-conjugated covalent organic framework containing bipyridine as the support for a Ru^II complex. Under visible-light irradiation, the Ru-COF was used as the photocatalyst that catalyzed the ring-opening reaction of α-ketoepoxides to give various target products with good functional group tolerance in moderate to high yields at room temperature. Importantly, compared with Ru(bpy)₃Cl₂, Ru-COF shows admirable reusability and higher catalytic activity. Furthermore, radical ions captured by the control experiments provided direct evidence for the mechanism of the visible light photoredox reaction.

二维（2D）金属共价有机骨架（MCOF）由于其优异的热稳定性和化学稳定性而被认为是一类有趣的新型光敏材料。在此，我们报道了一种多相金属光催化剂Ru-COF，它是通过使用含有联吡啶的sp ²碳共轭共价有机骨架作为Ru ^II配合物的载体制备的。在可见光照射下，Ru-COF作为光催化剂，催化α-酮环氧化物的开环反应，在室温下以中等到高产率得到各种具有良好官能团耐受性的目标产物。重要的是，与 Ru(bpy) ₃ Cl _2相比，Ru-COF表现出令人钦佩的可重复使用性和更高的催化活性。此外，对照实验捕获的自由基离子为可见光光氧化还原反应的机制提供了直接证据。