Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 42, Pages 14988-14997Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201602892
Keywords
butene isomers; gas separation; metal-organic frameworks; tricarboxylate; zirconium
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Funding
- National Natural Science Foundation of China [21301156]
- Natural Science Foundation of Zhejiang province, China [LR16B010001]
- Qianjiang Talents Project in Zhejiang province [ZC304015017]
- Welch Foundation [AX-1730]
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By using a novel C-3-symmetrical tricarboxylate (4,4',4''-benzene-1,3,5-triyl-1,1',1''-trinaphthoic acid), a novel zirconium-based metal-organic framework ZJNU-30 was solvothermally synthesized and structurally characterized. Single-crystal X-ray structural analyses show that ZJNU-30 consists of Zr-6-based nodes connected by the organic linkers to form a (3,8)-connected network featuring the coexistence of two different polyhedral cages: octahedral and cuboctahedral cages with the dimensions of about 14 and 22 angstrom, respectively. Remarkably, ZJNU-30 is very stable when exposed to air for one month. More importantly, with a moderately high surface area, hierarchical pore structures, and an aromatic-rich pore surface in the framework, ZJNU-30, after activation, exhibits a promising potential for the selective adsorptive separation of industrially important butene isomers consisting of cis-2-butene, trans-2-butene, 1-butene, and isobutene at ambient temperature. This separation was established exclusively by gas adsorption isotherms and simulated breakthrough experiments. To the best of our knowledge, this is the first study investigating porous metal-organic frameworks for butene-isomer separation.
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