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Copper(I) iodide cluster complexes are promising candidates for advanced x\u2010ray imaging applications due to their excellent optical properties and solution\u2010processable nature. Herein, we report two green\u2010emitting Cu\n                    <jats:sub>2<\/jats:sub>\n                    I\n                    <jats:sub>2<\/jats:sub>\n                    cluster\u2010based complexes achieved through a dual\u2010ligand strategy. The rigid P,N\u2010bridging ligand serves to construct the emissive Cu\n                    <jats:sub>2<\/jats:sub>\n                    I\n                    <jats:sub>2<\/jats:sub>\n                    core and improve exciton utilization, while the meta\u2010fluorinated ancillary ligand introduces multiple weak interactions, suppressing nonradiative decay and enhancing water stability. Together with the aggregation\u2010induced emission (AIE) characteristics, two complexes achieve high photoluminescence quantum yields (PLQYs) of 86.4% and 92.5% in the solid state, respectively. The optimal complex shows efficient radioluminescence (RL) with a low detection limit of 73.5 nGy\n                    <jats:sub>air<\/jats:sub>\n                    s\n                    <jats:sup>\u22121<\/jats:sup>\n                    . The fabricated flexible screen exhibits stable x\u2010ray imaging performance with a spatial resolution up to 21.4 lp mm\n                    <jats:sup>\u22121<\/jats:sup>\n                    . More importantly, the complex demonstrates exceptional structural integrity and emission stability in air and water. These attributes ultimately allow for high\u2010performance underwater x\u2010ray imaging. This work not only provides a ligand\u2010engineering strategy for the construction of high\u2010PLQY, water\u2010resistant copper\u2010cluster\u2010based scintillators, but also advances their practical application in emerging x\u2010ray imaging scenarios.\n                  <\/jats:p>","DOI":"10.1002\/anie.7210262","type":"journal-article","created":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T08:22:03Z","timestamp":1790065323000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Highly Efficient and Water\u2010Resistant Copper\u2013Iodide Emitters Toward Underwater X\u2010Ray Imaging"],"prefix":"10.1002","author":[{"given":"Xue","family":"Gao","sequence":"first","affiliation":[{"name":"State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences  Fuzhou Fujian P. R. China"},{"name":"University of Chinese Academy of Sciences  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yonghao","family":"Zhu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences  Fuzhou Fujian P. R. China"},{"name":"University of Chinese Academy of Sciences  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiyuan","family":"Wu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences  Fuzhou Fujian P. R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9741-022X","authenticated-orcid":false,"given":"Lian","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences  Fuzhou Fujian P. R. China"},{"name":"University of Chinese Academy of Sciences  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1347-6046","authenticated-orcid":false,"given":"Maochun","family":"Hong","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences  Fuzhou Fujian P. R. 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