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Among the various catalysts available for photocatalytic O<jats:sub>2<\/jats:sub> activation, homogeneous aryl ketones are at the forefront. To avoid the degradation and deactivation of aryl ketones, 9\u2010fluorenone\u2010based porous organic polymers were designed and regulated by doping them with co\u2010monomers. The obtained heterogeneous photocatalyst showed good performance in O<jats:sub>2<\/jats:sub> activation, and its performance was better than that of homogeneous 9\u2010fluorenone. The obtained heterogeneous photocatalyst showed good reusability. We believe that the presented method and findings represent an important step toward designing catalysts tailored for specific tasks.<\/jats:p>","DOI":"10.1002\/anie.202319139","type":"journal-article","created":{"date-parts":[[2023,12,22]],"date-time":"2023-12-22T03:39:42Z","timestamp":1703216382000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Metal\u2010Free Activation of Molecular Oxygen by 9\u2010Fluorenone\u2010Based Porous Organic Polymers for Selective Aerobic Oxidation"],"prefix":"10.1002","volume":"63","author":[{"given":"Yinwei","family":"Wang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics Chinese Academy of Sciences  457 Zhongshan Road Dalian 116023 P. R. China"},{"name":"University of Chinese Academy of Sciences  Beijing 100049 P. R. 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