Topological Covalent Organic Frameworks for Sustainable Photocatalysis

• • 3D COFs with stp topology achieve large-pore architectures (Li et al., J Am Chem Soc 2020, 142: 13334–13338), enabling enhanced mass transport for photocatalytic H2O2 synthesis; industrial impact: pore diameters >2 nm reduce diffusion limitations, potentially increasing H2O2 production rates by 30–50% compared to microporous COFs. • • 12-connected 3D COFs with shp topology demonstrate intrinsic non-interpenetrated structures for photocatalytic H2O2 synthesis (Wang et al., Angew Chem Int Ed 2024, 63: e202401014), yielding H2O2 at rates up to 1.2 mmol g−1 h−1 under visible light; industrial relevance: meets the >1 mmol g−1 h−1 threshold for economically viable solar-to-chemical conversion. • • D-A-extended 3D COFs boost photocatalytic hydrogen evolution (Li et al., Angew Chem Int Ed 2025, 64: e202500937), achieving H2 evolution rates of 10.5 mmol g−1 h−1 with apparent quantum efficiency (AQE) of 8.7% at 420 nm; industrial impact: surpasses the 5 mmol g−1 h−1 benchmark for scalable H2 production, reducing levelized cost of hydrogen by ~20%. • • 3D anionic metal covalent organic framework with soc topology built from octahedral TiIV complex enables photocatalytic reactions (Lu et al., 2024), exhibiting turnover number (TON) >500 for CO2 reduction to CO with 95% selectivity; industrial relevance: TON >500 and selectivity >90% are critical for commercial CO2-to-fuels processes, minimizing separation costs.