{"title":"v形配体表征的cu基金属有机骨架及其在C2H2/CO2和C2H2/CH4高效分离中的应用","authors":"Miaomiao Zhang, Jiashuo Zhao, Siqi Li, Xiaolong Luo*, Shi-Tong Zhang, Yizhi Shao* and Xiaofei Zhu*, ","doi":"10.1021/acs.cgd.4c0152410.1021/acs.cgd.4c01524","DOIUrl":null,"url":null,"abstract":"<p >Two Cu-based metal–organic frameworks (Cu-MOFs) with new topologies were successfully synthesized under solvothermal conditions using V-shaped nitrogen-containing tetracarboxylic acid ligands: [Cu<sub>9</sub>O(PADDA)<sub>4</sub>(H<sub>2</sub>O)<sub>6</sub>]·xGuest (compound <b>1</b>), [H<sub>3</sub>O][Cu<sub>6</sub>(PIDDA)<sub>3</sub>(H<sub>2</sub>O)<sub>4</sub>(HCOO)]·xGuest (compound <b>2</b>), (H<sub>4</sub>PADDA = 5,5′-(pyrazine-2,6-diyl)diisophthalic acid; H<sub>4</sub>PIDDA = 5,5′-(pyrimidine-4,6-diyl)diisophthalic acid). Structural analysis reveals that both compounds are constructed from [Cu<sub>2</sub>(COO)<sub>4</sub>] characterized by classic paddlewheel building units. Notably, compound <b>1</b> features a rare structural unit of tetranuclear copper characterized by two paddlewheel-structured dinuclear copper units connected by a bridging oxygen atom. In contrast, compound <b>2</b> features a structural unit of tetranuclear copper formed by formic acid connecting two adjacent paddlewheel-structured dinuclear copper units. Both frameworks exhibit three distinct cage structures of different sizes. These compounds demonstrate high specific surface areas and excellent adsorption capabilities for small gas molecules, such as CO<sub>2</sub>, CH<sub>4</sub>, and C<sub>2</sub>H<sub>2</sub>, enabling effective purification of acetylene. At 100 kPa and 298 K, compound <b>1</b> show an ideal adsorbed solution theory (IAST) selectivity of 4.0 and 20.0 for equimolar C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/CH<sub>4</sub> mixtures, respectively. The IAST selectivity corresponding to compound <b>2</b> increased to 7.1 and 57.6. Meanwhile, the actual separation performance was verified by breakthrough experiments, demonstrating the potential to separate C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/CH<sub>4</sub> mixtures at room temperature.</p>","PeriodicalId":34,"journal":{"name":"Crystal Growth & Design","volume":"25 7","pages":"2002–2012 2002–2012"},"PeriodicalIF":3.2000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Cu-Based Metal–Organic Frameworks Characterized by V-Shaped Ligands and Application to Efficient Separation of C2H2/CO2 and C2H2/CH4\",\"authors\":\"Miaomiao Zhang, Jiashuo Zhao, Siqi Li, Xiaolong Luo*, Shi-Tong Zhang, Yizhi Shao* and Xiaofei Zhu*, \",\"doi\":\"10.1021/acs.cgd.4c0152410.1021/acs.cgd.4c01524\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Two Cu-based metal–organic frameworks (Cu-MOFs) with new topologies were successfully synthesized under solvothermal conditions using V-shaped nitrogen-containing tetracarboxylic acid ligands: [Cu<sub>9</sub>O(PADDA)<sub>4</sub>(H<sub>2</sub>O)<sub>6</sub>]·xGuest (compound <b>1</b>), [H<sub>3</sub>O][Cu<sub>6</sub>(PIDDA)<sub>3</sub>(H<sub>2</sub>O)<sub>4</sub>(HCOO)]·xGuest (compound <b>2</b>), (H<sub>4</sub>PADDA = 5,5′-(pyrazine-2,6-diyl)diisophthalic acid; H<sub>4</sub>PIDDA = 5,5′-(pyrimidine-4,6-diyl)diisophthalic acid). Structural analysis reveals that both compounds are constructed from [Cu<sub>2</sub>(COO)<sub>4</sub>] characterized by classic paddlewheel building units. Notably, compound <b>1</b> features a rare structural unit of tetranuclear copper characterized by two paddlewheel-structured dinuclear copper units connected by a bridging oxygen atom. In contrast, compound <b>2</b> features a structural unit of tetranuclear copper formed by formic acid connecting two adjacent paddlewheel-structured dinuclear copper units. Both frameworks exhibit three distinct cage structures of different sizes. These compounds demonstrate high specific surface areas and excellent adsorption capabilities for small gas molecules, such as CO<sub>2</sub>, CH<sub>4</sub>, and C<sub>2</sub>H<sub>2</sub>, enabling effective purification of acetylene. At 100 kPa and 298 K, compound <b>1</b> show an ideal adsorbed solution theory (IAST) selectivity of 4.0 and 20.0 for equimolar C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/CH<sub>4</sub> mixtures, respectively. The IAST selectivity corresponding to compound <b>2</b> increased to 7.1 and 57.6. Meanwhile, the actual separation performance was verified by breakthrough experiments, demonstrating the potential to separate C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/CH<sub>4</sub> mixtures at room temperature.</p>\",\"PeriodicalId\":34,\"journal\":{\"name\":\"Crystal Growth & Design\",\"volume\":\"25 7\",\"pages\":\"2002–2012 2002–2012\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-03-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Crystal Growth & Design\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acs.cgd.4c01524\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Crystal Growth & Design","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.cgd.4c01524","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Cu-Based Metal–Organic Frameworks Characterized by V-Shaped Ligands and Application to Efficient Separation of C2H2/CO2 and C2H2/CH4
Two Cu-based metal–organic frameworks (Cu-MOFs) with new topologies were successfully synthesized under solvothermal conditions using V-shaped nitrogen-containing tetracarboxylic acid ligands: [Cu9O(PADDA)4(H2O)6]·xGuest (compound 1), [H3O][Cu6(PIDDA)3(H2O)4(HCOO)]·xGuest (compound 2), (H4PADDA = 5,5′-(pyrazine-2,6-diyl)diisophthalic acid; H4PIDDA = 5,5′-(pyrimidine-4,6-diyl)diisophthalic acid). Structural analysis reveals that both compounds are constructed from [Cu2(COO)4] characterized by classic paddlewheel building units. Notably, compound 1 features a rare structural unit of tetranuclear copper characterized by two paddlewheel-structured dinuclear copper units connected by a bridging oxygen atom. In contrast, compound 2 features a structural unit of tetranuclear copper formed by formic acid connecting two adjacent paddlewheel-structured dinuclear copper units. Both frameworks exhibit three distinct cage structures of different sizes. These compounds demonstrate high specific surface areas and excellent adsorption capabilities for small gas molecules, such as CO2, CH4, and C2H2, enabling effective purification of acetylene. At 100 kPa and 298 K, compound 1 show an ideal adsorbed solution theory (IAST) selectivity of 4.0 and 20.0 for equimolar C2H2/CO2 and C2H2/CH4 mixtures, respectively. The IAST selectivity corresponding to compound 2 increased to 7.1 and 57.6. Meanwhile, the actual separation performance was verified by breakthrough experiments, demonstrating the potential to separate C2H2/CO2 and C2H2/CH4 mixtures at room temperature.
期刊介绍：
The aim of Crystal Growth & Design is to stimulate crossfertilization of knowledge among scientists and engineers working in the fields of crystal growth, crystal engineering, and the industrial application of crystalline materials.
Crystal Growth & Design publishes theoretical and experimental studies of the physical, chemical, and biological phenomena and processes related to the design, growth, and application of crystalline materials. Synergistic approaches originating from different disciplines and technologies and integrating the fields of crystal growth, crystal engineering, intermolecular interactions, and industrial application are encouraged.
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