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Methanol\u2010to\u2010olefins (MTO) is a promising alternative approach for producing ethylene from non\u2010petroleum feedstocks, in which the separation of propylene\/ethylene is particularly crucial. In this study, a metal azolate framework (MAF) [Zn\n                    <jats:sub>7<\/jats:sub>\n                    (\n                    <jats:italic>\u03bc<\/jats:italic>\n                    \u2010H\n                    <jats:sub>2<\/jats:sub>\n                    O)(tppa)\n                    <jats:sub>4<\/jats:sub>\n                    (HCOO)\n                    <jats:sub>2<\/jats:sub>\n                    ] (MAF\u201068, where H\n                    <jats:sub>3<\/jats:sub>\n                    tppa = tris(4\u2010(1\u2010(tetrahydro\u20102\n                    <jats:italic>H<\/jats:italic>\n                    \u2010pyran\u20102\u2010yl)\u20101\n                    <jats:italic>H<\/jats:italic>\n                    \u2010pyrazol\u20104\u2010yl)phenyl)amine) has been synthesized with rare zinc pyrazolate chains comprising\n                    <jats:italic>\u03bc<\/jats:italic>\n                    \u2010H\n                    <jats:sub>2<\/jats:sub>\n                    O bridges, namely Zn\n                    <jats:sub>7<\/jats:sub>\n                    (\n                    <jats:italic>\u03bc<\/jats:italic>\n                    \u2010H\n                    <jats:sub>2<\/jats:sub>\n                    O)(Rpz)\n                    <jats:sub>12<\/jats:sub>\n                    (HCOO)\n                    <jats:sub>2<\/jats:sub>\n                    (Rpz\n                    <jats:sup>\u2212<\/jats:sup>\n                    denotes pyrazolate groups), for the separation of propylene\/ethylene mixtures. Sorption experiments indicated that MAF\u201068 shows a remarkable uptake of 4.19 mmol g\n                    <jats:sup>\u22121<\/jats:sup>\n                    for propylene (at 10 kPa), which is significantly higher than those of many other reported porous materials for C\n                    <jats:sub>3<\/jats:sub>\n                    H\n                    <jats:sub>6<\/jats:sub>\n                    \/C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    separation. MAF\u201068 also shows a high selectivity of 9.5 for 2\/5 C\n                    <jats:sub>3<\/jats:sub>\n                    H\n                    <jats:sub>6<\/jats:sub>\n                    \/C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    . Breakthrough experiments further confirm the separation potential of this material for high\u2010purity C\n                    <jats:sub>3<\/jats:sub>\n                    H\n                    <jats:sub>6<\/jats:sub>\n                    (99.9999%) and C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    (99.9999%).\n                  <\/jats:p>","DOI":"10.1002\/smll.202504613","type":"journal-article","created":{"date-parts":[[2025,5,15]],"date-time":"2025-05-15T03:49:23Z","timestamp":1747280963000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Zinc Pyrazolate Framework with Knotted\u2010Like Chains for Separation of Propylene\/Ethylene Mixtures"],"prefix":"10.1002","volume":"21","author":[{"given":"Ying\u2010Guang","family":"Li","sequence":"first","affiliation":[{"name":"MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCME Sun Yat\u2010Sen University  Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun\u2010Xian","family":"Chen","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCME Sun Yat\u2010Sen University  Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing\u2010Hong","family":"Li","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCME Sun Yat\u2010Sen University  Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen\u2010Xuan","family":"Zhou","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCME Sun Yat\u2010Sen University  Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Libo","family":"Li","sequence":"additional","affiliation":[{"name":"College of Chemical Engineering and Technology Taiyuan University of Technology  Taiyuan 030024 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinping","family":"Li","sequence":"additional","affiliation":[{"name":"College of Chemical Engineering and Technology Taiyuan University of Technology  Taiyuan 030024 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3267-220X","authenticated-orcid":false,"given":"Rui\u2010Biao","family":"Lin","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCME Sun Yat\u2010Sen University  Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie\u2010Peng","family":"Zhang","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCME Sun Yat\u2010Sen University  Guangzhou 510275 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiao\u2010Ming","family":"Chen","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of Chemistry IGCME Sun Yat\u2010Sen University  Guangzhou 510275 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