Inspired by the concept of frustrated Lewis pairs (FLPs) from homogeneous catalysis, an organic supramolecular bridged metal-organic frameworks (MOFs) heterojunction, i.e., a perylene-3,4,9,10-tetracarboxylic diimide@MIL-125(Ti)-NH₂ (denoted PDI@MTi) composite is successfully fabricated via a two-step synthesis method. Experimental characterisations and theoretical calculations reveal that in the obtained “TiO_5−x-ligand-PDI” FLPs, the unsaturated Ti-O clusters function as a Lewis acid to accept photogenerated electrons, and the PDI sites act as a Lewis base to capture photogenerated holes. With the unique structure characteristics, the PDI@MTi shows excellent photocatalytic activity toward the disinfection of Staphylococcus aureus and Cr(VI) reduction, with 1.0- and 10.3-fold enhancements, respectively, compared with unadorned MTi. The synergic effects of the micro polarisation field, multiple active sites, and a C-N bonded interface contributed to photoactivity enhancement. This work demonstrates the potential of using MTi as a platform for constructing FLPs-containing heterogeneous photocatalysts and provides new strategies to control carrier separation.

受均相催化受挫路易斯对 (FLPs) 概念的启发，有机超分子桥接金属有机框架 (MOFs) 异质结，即苝-3,4,9,10-四羧酸二亚胺@MIL-125(Ti) -NH ₂（表示为PDI@MTi）复合材料通过两步合成方法成功制备。实验表征和理论计算表明，在获得的“TiO _5−x -ligand-PDI”FLPs中，不饱和的Ti-O簇作为路易斯酸接受光生电子，PDI位点作为路易斯碱来捕获光生电子。孔。PDI@MTi具有独特的结构特征，对金黄色葡萄球菌的消毒表现出优异的光催化活性与未修饰的 MTi 相比，Cr(VI) 减少，分别增强 1.0 倍和 10.3 倍。微极化场、多个活性位点和 CN 键合界面的协同作用有助于提高光活性。这项工作展示了使用 MTi 作为构建含有 FLPs 的非均相光催化剂的平台的潜力，并提供了控制载流子分离的新策略。