{"title":"金属-有机框架膜中乙烯/乙烷分离的空间选择性重构","authors":"Ziqi Xu, , , Jia Wang, , , Yuchen Gao, , , Lingchuan Li, , , Wenjiang Zeng, , , Xiangyu Guo*, , and , Qingyuan Yang*, ","doi":"10.1021/acsmaterialslett.5c00935","DOIUrl":null,"url":null,"abstract":"<p >Due to the similar kinetic diameters and physicochemical properties of ethylene and ethane, developing highly efficient C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> separation membranes remains a huge challenge. In this study, spatio-selective reconfiguration of a Ni-pca-pyz metal–organic framework (MOF) membrane was discovered upon vacuum heat treatment. The progressive migration of the low-boiling-point pyrazine ligands on the coordination unsaturated metal sites in the structure can result in the preferential exposure of the (001) crystal plane, thus the significant increase in C<sub>2</sub>H<sub>4</sub> selectivity due to the optimized diffusion path. The Ni-pca-pyz membrane with preferential (001) crystal plane orientation shows highly competitive C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> separation performance, with a C<sub>2</sub>H<sub>4</sub> permeance of 351.2 GPU and a C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> separation factor of 5.6 during mixed-gas permeation, highlighting the promising application of the vacuum heat treatment protocol in structure optimization and performance enhancement of versatile MOF membranes.</p>","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"7 10","pages":"3413–3419"},"PeriodicalIF":8.7000,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Spatio-Selective Reconfiguration for Enhanced Ethylene/Ethane Separation in Metal–Organic Framework Membranes\",\"authors\":\"Ziqi Xu, , , Jia Wang, , , Yuchen Gao, , , Lingchuan Li, , , Wenjiang Zeng, , , Xiangyu Guo*, , and , Qingyuan Yang*, \",\"doi\":\"10.1021/acsmaterialslett.5c00935\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Due to the similar kinetic diameters and physicochemical properties of ethylene and ethane, developing highly efficient C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> separation membranes remains a huge challenge. In this study, spatio-selective reconfiguration of a Ni-pca-pyz metal–organic framework (MOF) membrane was discovered upon vacuum heat treatment. The progressive migration of the low-boiling-point pyrazine ligands on the coordination unsaturated metal sites in the structure can result in the preferential exposure of the (001) crystal plane, thus the significant increase in C<sub>2</sub>H<sub>4</sub> selectivity due to the optimized diffusion path. The Ni-pca-pyz membrane with preferential (001) crystal plane orientation shows highly competitive C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> separation performance, with a C<sub>2</sub>H<sub>4</sub> permeance of 351.2 GPU and a C<sub>2</sub>H<sub>4</sub>/C<sub>2</sub>H<sub>6</sub> separation factor of 5.6 during mixed-gas permeation, highlighting the promising application of the vacuum heat treatment protocol in structure optimization and performance enhancement of versatile MOF membranes.</p>\",\"PeriodicalId\":19,\"journal\":{\"name\":\"ACS Materials Letters\",\"volume\":\"7 10\",\"pages\":\"3413–3419\"},\"PeriodicalIF\":8.7000,\"publicationDate\":\"2025-09-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Materials Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsmaterialslett.5c00935\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Materials Letters","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmaterialslett.5c00935","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Spatio-Selective Reconfiguration for Enhanced Ethylene/Ethane Separation in Metal–Organic Framework Membranes
Due to the similar kinetic diameters and physicochemical properties of ethylene and ethane, developing highly efficient C2H4/C2H6 separation membranes remains a huge challenge. In this study, spatio-selective reconfiguration of a Ni-pca-pyz metal–organic framework (MOF) membrane was discovered upon vacuum heat treatment. The progressive migration of the low-boiling-point pyrazine ligands on the coordination unsaturated metal sites in the structure can result in the preferential exposure of the (001) crystal plane, thus the significant increase in C2H4 selectivity due to the optimized diffusion path. The Ni-pca-pyz membrane with preferential (001) crystal plane orientation shows highly competitive C2H4/C2H6 separation performance, with a C2H4 permeance of 351.2 GPU and a C2H4/C2H6 separation factor of 5.6 during mixed-gas permeation, highlighting the promising application of the vacuum heat treatment protocol in structure optimization and performance enhancement of versatile MOF membranes.
期刊介绍：
ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.
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