Qiu, J., Cheng, C., García, H., Liang, G., Zhu, B., Zhang, L., Yu, J. (2025). Metal‐Free Singlet Oxygen Generation via Excited‐State Intramolecular Proton‐Transfer‐Driven Intersystem Crossing in 2D Covalent Organic Frameworks. Angewandte Chemie International Edition. https://doi.org/10.1002/anie.202515898