A Threefold Interpenetrated Pillared-Layer Metal-Organic Framework for Selective Separation of C2H2/CH4 and CO2/CH4

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• 作者：Osamah Alduhaish ; Dr. Hailong Wang ; Dr. Bin Li ; Dr. Hadi D. Arman ; Prof. Dr. Vladimir Nesterov ; Prof. Dr. Khalid Alfooty and Prof. Dr. Banglin Chen
• 刊名：ChemPlusChem
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：81
• 期：8
• 页码：764-769
• 全文大小：1124K
• ISSN：2192-6506

文摘

A new threefold interpenetrated pillared-layer microporous metal–organic framework, [Zn₂(cca)₂(4-bpdb)]_n⋅(DMF)_2n (UTSA-85) (H₂cca=4-carboxycinnamic acid, 4-bpdb=1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene, and DMF=N,N-dimethylformamide), has been designed and generated by the solvothermal reaction of mixed ligands (H₂cca and 4-bpdb) and Zn(NO₃)₂⋅6 H₂O. Single-crystal XRD analysis disclosed that discrete paddle-wheel Zn₂(COO)₄ clusters as secondary building units linked the cca ligands to give two-dimensional layers, which were further pillared by 4-bpdb ligands to form a threefold interpenetrated pillared-layer structure. The desolvated framework, UTSA-85 a, was revealed to exhibit permanent porosity with a BET surface area of 558 m² g⁻¹ and a high selectivity of 64 for C₂H₂/CH₄ separation at 296 K owing to the microporous (≈5.0 Å) structure and functional azine groups that decorated the pore channels.