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Herein, we report a systematic study of four tetrahedral, microporous, self\u2010assembled palladium\u2010based coordination cages (\n                    <jats:bold>C1\u2013C4<\/jats:bold>\n                    ) incorporating high\u2010affinity binding motifs, including naphthalene, tetrazine, benzothiadiazole, and benzene. Despite the absence of permanent porosity, these cages exhibit exceptional iodine uptake, reaching up to ~3.78\u00a0g g\n                    <jats:sup>\u20121<\/jats:sup>\n                    in the vapor phase at 75\n                    <jats:sup>\u03bf<\/jats:sup>\n                    C and ~3.52\u00a0g g\n                    <jats:sup>\u20121<\/jats:sup>\n                    in aqueous media, accompanied by fast kinetics surpassing state\u2010of\u2010the\u2010art COFs and MOFs. Dynamic flow\u2010through experiments further demonstrate their efficiency, with\n                    <jats:bold>C4<\/jats:bold>\n                    achieving a record elution volume of 9.2 L g\n                    <jats:sup>\u20121<\/jats:sup>\n                    in a 0.5\u00a0mM I\n                    <jats:sub>3<\/jats:sub>\n                    <jats:sup>\u2212<\/jats:sup>\n                    solution. The cages enable efficient iodine removal under dynamic vapor\u2010phase conditions (1.92\u00a0g g\n                    <jats:sup>\u20121<\/jats:sup>\n                    ), reduce iodine concentrations from ppm to ppb levels in real water samples, and exhibit strong affinity toward methyl iodide vapor (up to 1.44\u00a0g g\n                    <jats:sup>\u20121<\/jats:sup>\n                    ). DFT calculations indicate that the observed performance originates from cooperative \u03c0\u2013iodine interactions and nucleophilic heteroatom binding. Combined with structural robustness, recyclability, and scalable synthesis, these coordination cages establish a new benchmark and represent the first example of dynamic vapor\u2010phase iodine capture by coordination cages.\n                  <\/jats:p>","DOI":"10.1002\/smll.73642","type":"journal-article","created":{"date-parts":[[2026,5,10]],"date-time":"2026-05-10T18:40:03Z","timestamp":1778438403000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Microporous Self\u2010Assembled Pd(II) Tetrahedral Cages for Rapid and Reversible Multi\u2010Phase Sequestration of Iodine and Methyl Iodide"],"prefix":"10.1002","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-9273-6746","authenticated-orcid":false,"given":"Raghunath","family":"Singha","sequence":"first","affiliation":[{"name":"School of Chemical Sciences National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI)  Khurda Odisha India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Risikeshan","family":"Pradhan","sequence":"additional","affiliation":[{"name":"School of Chemical Sciences National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI)  Khurda Odisha India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Monotosh","family":"Dalapati","sequence":"additional","affiliation":[{"name":"School of Chemical Sciences National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI)  Khurda Odisha India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pijush","family":"De","sequence":"additional","affiliation":[{"name":"School of Chemical Sciences National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI)  Khurda Odisha India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Debashree","family":"Manna","sequence":"additional","affiliation":[{"name":"Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences  Prague Praha Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dipak","family":"Samanta","sequence":"additional","affiliation":[{"name":"School of Chemical Sciences National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI)  Khurda Odisha India"},{"name":"Center For Interdisciplinary Sciences (CIS) National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI)  Khurda Odisha India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,5,10]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.enpol.2011.02.043"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2EE02695C"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/es504293b"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.3389\/fchem.2023.1122484"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1039\/C7DT03670A"},{"key":"e_1_2_9_7_1","volume-title":"The Role of Nuclear Energy in the Global Energy Transition","author":"Davidson A. 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