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| A Flexible Ultramicroporous Metal-Organic Framework for Size-Selective Carbon Dioxide Capture Constructed from a Semirigid Ligand |
| Author Name | Affiliation | E-mail | | ZHAO Min | College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China | | | WU Dong | Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China | | | JIANG Fei-Long | Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China | | | CHEN Qi-Hui | Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China | chenqh@fjirsm.ac.cn;洪茂椿，hmc@fjirsm.ac.cn | | HONG Mao-Chun | Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China | hmc@fjirsm.ac.cn |
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| Abstract: Herein, a flexible ultramicroporous metal-organic framework {[Co(DTBDA)]·4H2O}n (FJI-H35) was prepared from a semirigid ligand 3',5'-di(1H-1,2,4-triazol-1-yl)-(1,1'-biphenyl)-3,5-dicarboxylic acid (H2DTBDA) and cobalt nitrate. After activation, FJI-H35 underwent an adaptive structural transformation, making the pore diameter shrink from 0.43 to 0.37 nm. Gas adsorption tests showed that FJI-H35 could selectively capture CO2 from N2 and CH4 with a high adsorption selectivity of 178 and a relatively low adsorption enthalpy (28.2 kJ·mol-1). Breakthrough experiments further confirmed that FJI-H35 could efficiently and selectively capture CO2 from CO2/N2 (15∶85, V/V) and CO2/CH4 (50∶50, V/V) mixtures. |
| Keywords: metal-organic framework structural transformation carbon dioxide capture molecular sieve effect selective adsorption |
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| ZHAO Min,WU Dong,JIANG Fei-Long,CHEN Qi-Hui,HONG Mao-Chun.A Flexible Ultramicroporous Metal-Organic Framework for Size-Selective Carbon Dioxide Capture Constructed from a Semirigid Ligand[J].Chinese Journal of Inorganic Chemistry,2022,38(12):2459-2468. |
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