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There remains a dearth of such regeneration\u2010optimized sorbents (ROSs), which thus far are limited exclusively to physisorbents mainly because chemisorbents typically require elevated temperatures for water recovery. Herein, the first comprehensive water sorption study of the\n                    <jats:bold>SIFSIX\u20103\u2010Ni<\/jats:bold>\n                    family of hybrid coordination networks (HCNs) and a new, related family of HCNs, reveals a shared cooperative chemisorption mechanism with markedly different RH thresholds and regeneration requirements. Whereas the\n                    <jats:bold>SIFSIX\u20103\u2010Ni<\/jats:bold>\n                    family operates outside the RH and regeneration limits of ROSs, four\n                    <jats:bold>M\u2032FSIX\u201025\u2010M<\/jats:bold>\n                    analogues (M = Co\n                    <jats:sup>2+<\/jats:sup>\n                    , Ni\n                    <jats:sup>2+<\/jats:sup>\n                    ; M' = Si\n                    <jats:sup>4+<\/jats:sup>\n                    , Ti\n                    <jats:sup>4+<\/jats:sup>\n                    ,\n                    <jats:bold>25<\/jats:bold>\n                    = 1,4\u2010bis(imidazol\u20101\u2010yl)naphthalene) exhibit both low\u2010RH chemisorption and regeneration from 34\u201044\u00b0C. The lead regeneration optimized chemisorbent,\n                    <jats:bold>ROC\u20101<\/jats:bold>\n                    (\n                    <jats:bold>TIFSIX\u201025\u2010Ni<\/jats:bold>\n                    ), has a projected water\u2010harvesting productivity of ca. 3.5\u00a0 L\n                    <jats:sub>sorbent<\/jats:sub>\n                    <jats:sup>\u22121<\/jats:sup>\n                    d\n                    <jats:sup>\u22121<\/jats:sup>\n                    . Density functional theory calculations provide insight into the energetics and mechanism of hydration\/dehydration in these first\u2010generation ROCs. This work establishes ROCs as a new class of desiccants that offers reversible chemisorption within the low\u2010RH and mild\u2010regeneration conditions relevant to AWH in arid environments.\n                  <\/jats:p>","DOI":"10.1002\/anie.6095254","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T15:55:03Z","timestamp":1790006103000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Regeneration\u2010Optimized Chemisorbents: Evaluating Hybrid Coordination Networks for Atmospheric Water Harvesting"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2940-8600","authenticated-orcid":false,"given":"Xiang\u2010Jing","family":"Kong","sequence":"first","affiliation":[{"name":"Bernal Institute and Department of Chemical Sciences University of Limerick  Limerick Ireland"},{"name":"Department of Chemical Engineering College of Materials Science and Engineering Beijing University of Technology  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7140-8543","authenticated-orcid":false,"given":"Asif","family":"Raza","sequence":"additional","affiliation":[{"name":"Bernal Institute and Department of Chemical Sciences University of Limerick  Limerick Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0757-7358","authenticated-orcid":false,"given":"Lilia","family":"Croitor","sequence":"additional","affiliation":[{"name":"Bernal Institute and Department of Chemical Sciences University of Limerick  Limerick Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0525-3547","authenticated-orcid":false,"given":"Andrey","family":"Bezrukov","sequence":"additional","affiliation":[{"name":"Bernal Institute and Department of Chemical Sciences University of Limerick  Limerick 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should be noted that BET surface areas of HUMs are routinely determined from CO2sorption data collected at 0 and 25\u00b0C. See references [6] [28]and [40]."},{"key":"e_1_2_8_44_1","doi-asserted-by":"publisher","DOI":"10.1351\/pac198557040603"},{"key":"e_1_2_8_45_1","unstructured":"Prolonged exposure to high RH under continuous flow and low partial pressures in the DVS resulted in degradation of theM\u2032FSIX\u20103\u2010Mcompounds. We hypothesize that this arises from water condensation between particles leading to localized deliquescence followed by sublimation of volatile pyrazine ligands. The excess moisture is subsequently removed during the RH decrease step of the experiment promoting recrystallization and resulting in a mixture of solid phases upon completion of the DVS measurement."},{"key":"e_1_2_8_46_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.aat3198"},{"key":"e_1_2_8_47_1","doi-asserted-by":"publisher","DOI":"10.1038\/srep19097"},{"key":"e_1_2_8_48_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.4c13797"},{"key":"e_1_2_8_49_1","doi-asserted-by":"publisher","DOI":"10.1039\/b301219k"},{"key":"e_1_2_8_50_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jssc.2005.05.038"},{"key":"e_1_2_8_51_1","doi-asserted-by":"publisher","DOI":"10.1039\/C4RA03794D"},{"key":"e_1_2_8_52_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.micromeso.2011.08.016"},{"key":"e_1_2_8_53_1","doi-asserted-by":"publisher","DOI":"10.1021\/cm3025445"},{"key":"e_1_2_8_54_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.enconman.2005.10.034"},{"key":"e_1_2_8_55_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.device.2023.100099"},{"key":"e_1_2_8_56_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0263097"},{"key":"e_1_2_8_57_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijrefrig.2011.06.012"},{"key":"e_1_2_8_58_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2024.01.011"},{"key":"e_1_2_8_59_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.283.5405.1148"},{"key":"e_1_2_8_60_1","doi-asserted-by":"publisher","DOI":"10.1021\/ar0201153"}],"container-title":["Angewandte Chemie International Edition"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/anie.6095254","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/anie.6095254","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/anie.6095254","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T15:55:06Z","timestamp":1790006106000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/anie.6095254"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,21]]},"references-count":59,"alternative-id":["10.1002\/anie.6095254"],"URL":"https:\/\/doi.org\/10.1002\/anie.6095254","archive":["Portico"],"relation":{},"ISSN":["1433-7851","1521-3773"],"issn-type":[{"value":"1433-7851","type":"print"},{"value":"1521-3773","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,21]]},"assertion":[{"value":"2026-06-26","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-09-14","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-09-21","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e6095254"}}