{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T06:44:23Z","timestamp":1792565063665,"version":"4.5.0"},"reference-count":55,"publisher":"Wiley","issue":"58","license":[{"start":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T00:00:00Z","timestamp":1787184000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T00:00:00Z","timestamp":1787184000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The separation of challenging mixtures such as water\/ethanol, CO\n                    <jats:sub>2<\/jats:sub>\n                    \/N\n                    <jats:sub>2<\/jats:sub>\n                    , and aliphatic\/aromatic amines requires tailor\u2010made materials with ultra\u2010micro porosity. Metal\u2010organic frameworks (MOFs) are well\u2010known for their unique properties, including pore tunability and useful functionalization. However, designing new ultra\u2010microporous MOFs is difficult owing to the limited availability of short linkers. Here, we report the synthesis of an ultra\u2010microporous zirconium\u2013based MOF constructed from the bulky, pyrene\u2010based 1,6\u2010pyrenedicarboxylate (1,6\u2010Pydca) linker. Contrary to the common strategy of shortening linker length to reduce pore size, the present work demonstrates that the lesser\u2010explored approach of increasing linker steric bulk offers an equally powerful means of modulating pore aperture. Incorporation of the 1,6\u2010Pydca linker yields an eight\u2010connected Zr cluster with \u223c4 \u00c5 pore window, thereby establishing linker width as a critical design parameter for ultra\u2010microporosity. The resulting MOF exhibits highly selective sorption: preferential uptake of water over ethanol, selective adsorption of CO\n                    <jats:sub>2<\/jats:sub>\n                    over N\n                    <jats:sub>2<\/jats:sub>\n                    , and turn\u2010off fluorescence sensing with small aliphatic amines (NH\n                    <jats:sub>3<\/jats:sub>\n                    , CH\n                    <jats:sub>3<\/jats:sub>\n                    NH\n                    <jats:sub>2<\/jats:sub>\n                    , C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>5<\/jats:sub>\n                    NH\n                    <jats:sub>2<\/jats:sub>\n                    ) in the presence of bulkier aromatic and aliphatic amines. These findings present an important dimension in MOF design, where linker length is no longer seen as a barrier to the design of ultra\u2010microporous MOFs. This enables next\u2010generation frameworks tailored for challenging gas\/vapor separations and size\u2010selective fluorescence sensing.\n                  <\/jats:p>","DOI":"10.1002\/smll.202512134","type":"journal-article","created":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T08:58:45Z","timestamp":1787216325000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Steric Engineering of Pore Window in Zr MOF: Achieving Ultra\u2010Microporosity for Selective Water\/CO\n                    <sub>2<\/sub>\n                    Uptake and Size\u2010Dependent Sensing of Amines"],"prefix":"10.1002","volume":"22","author":[{"given":"Govu","family":"Radha","sequence":"first","affiliation":[{"name":"Department of Chemistry Birla Institute of Technology and Science Hyderabad Campus  Hyderabad India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0601-699X","authenticated-orcid":false,"given":"Himanshu","family":"Aggarwal","sequence":"additional","affiliation":[{"name":"Department of Chemistry Birla Institute of Technology and Science Hyderabad Campus  Hyderabad India"},{"name":"Materials Center for Sustainable Energy &amp; Environment (McSEE) Birla Institute of Technology and Science Hyderabad Campus  Hyderabad India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,20]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsmaterialslett.3c01157"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2019.02.007"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsomega.2c07719"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41545\u2010024\u201000408\u20104"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202015250"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1039\/C7CS00153C"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsami.9b14367"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202303447"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2019.10.012"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsami.0c21554"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202502860"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2017.11.005"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsmaterialslett.4c02499"},{"key":"e_1_2_10_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2021.129569"},{"key":"e_1_2_10_16_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202303374"},{"key":"e_1_2_10_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2017.09.002"},{"key":"e_1_2_10_18_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202213221"},{"key":"e_1_2_10_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2023.147902"},{"key":"e_1_2_10_20_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202402509"},{"key":"e_1_2_10_21_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.memsci.2022.120879"},{"key":"e_1_2_10_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.seppur.2023.125883"},{"key":"e_1_2_10_23_1","doi-asserted-by":"publisher","DOI":"10.1038\/srep27813"},{"key":"e_1_2_10_24_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.4c06718"},{"key":"e_1_2_10_25_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.inorgchem.4c00278"},{"key":"e_1_2_10_26_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsomega.0c01504"},{"key":"e_1_2_10_27_1","doi-asserted-by":"publisher","DOI":"10.1039\/D0MA00083C"},{"key":"e_1_2_10_28_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202414724"},{"key":"e_1_2_10_29_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.0c09466"},{"key":"e_1_2_10_30_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2023.02.002"},{"key":"e_1_2_10_31_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467\u2010020\u201017640\u20104"},{"key":"e_1_2_10_32_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1230444"},{"key":"e_1_2_10_33_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature01650"},{"key":"e_1_2_10_34_1","doi-asserted-by":"publisher","DOI":"10.1002\/sstr.202000022"},{"key":"e_1_2_10_35_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200300610"},{"key":"e_1_2_10_36_1","doi-asserted-by":"publisher","DOI":"10.1039\/C5CS00940E"},{"key":"e_1_2_10_37_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201704303"},{"key":"e_1_2_10_38_1","doi-asserted-by":"publisher","DOI":"10.1039\/C5SC00614G"},{"key":"e_1_2_10_39_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.trechm.2023.02.009"},{"key":"e_1_2_10_40_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2CC00288D"},{"key":"e_1_2_10_41_1","doi-asserted-by":"publisher","DOI":"10.1039\/C3CC46105J"},{"key":"e_1_2_10_42_1","doi-asserted-by":"publisher","DOI":"10.1002\/cctc.201801452"},{"key":"e_1_2_10_43_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.inorgchem.3c02318"},{"key":"e_1_2_10_44_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejic.201700010"},{"key":"e_1_2_10_45_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2020.127388"},{"key":"e_1_2_10_46_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.cgd.7b00892"},{"key":"e_1_2_10_47_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.9b02947"},{"key":"e_1_2_10_48_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp412588f"},{"key":"e_1_2_10_49_1","doi-asserted-by":"publisher","DOI":"10.1039\/B802426J"},{"key":"e_1_2_10_50_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.micromeso.2022.111920"},{"key":"e_1_2_10_51_1","doi-asserted-by":"publisher","DOI":"10.1039\/C4SC03224A"},{"key":"e_1_2_10_52_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.inorgchem.4c02210"},{"key":"e_1_2_10_53_1","doi-asserted-by":"publisher","DOI":"10.1039\/D4TC03702B"},{"key":"e_1_2_10_54_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpcc.3c01377"},{"key":"e_1_2_10_55_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemmater.2c02706"},{"key":"e_1_2_10_56_1","doi-asserted-by":"publisher","DOI":"10.1039\/C5CC04860E"}],"container-title":["Small"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/smll.202512134","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/smll.202512134","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/smll.202512134","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T06:00:57Z","timestamp":1792562457000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/smll.202512134"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,20]]},"references-count":55,"journal-issue":{"issue":"58","published-print":{"date-parts":[[2026,10]]}},"alternative-id":["10.1002\/smll.202512134"],"URL":"https:\/\/doi.org\/10.1002\/smll.202512134","archive":["Portico"],"relation":{},"ISSN":["1613-6810","1613-6829"],"issn-type":[{"value":"1613-6810","type":"print"},{"value":"1613-6829","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,20]]},"assertion":[{"value":"2025-10-02","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-04","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-20","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e12134"}}