Junyi Qiu, Chang Cheng, Hermenegildo García, Guijie Liang, Bicheng Zhu, Liuyang Zhang, Jiaguo Yu. "Metal‐Free Singlet Oxygen Generation via Excited‐State Intramolecular Proton‐Transfer‐Driven Intersystem Crossing in 2D Covalent Organic Frameworks." Angewandte Chemie International Edition, 2025. doi:10.1002/anie.202515898