Expanded Porous Metal–Organic Frameworks by SCSC: Organic Building Units Modifying and Enhanced Gas-Adsorption Properties

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• 作者：Weidong Fan ; Huan Lin ; Xue Yuan ; Fangna Dai ; Zhenyu Xiao ; Liangliang Zhang ; Liwen Luo ; Rongming Wang
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：July 5, 2016
• 年：2016
• 卷：55
• 期：13
• 页码：6420-6425
• 全文大小：515K
• 年卷期：0
• ISSN：1520-510X

文摘

Two amino-functional copper metal–organic frameworks of formula [Cu₃(ATTCA)₂(H₂O)₃]·2DMF·11H₂O·12EtOH (1) (H₃ATTCA = 2-amino-[1,1:3,1-terphenyl]-4,4,5-tricarboxylic acid, pyz = pyrazine, DMF = dimethylformamide) and [Cu₃(ATTCA)₂(pyz)(H₂O)]·2DMF·12H₂O·8EtOH (2) were synthesized under solvothermal conditions and characterized by single-crystal X-ray diffraction, infrared spectroscopy, elemental analyses, thermogravimetric analyses, and powder X-ray diffraction. Single-crystal X-ray diffraction analysis revealed that both complexes 1 and 2 are built of the Cu₂(COO)₄ paddlewheel secondary building units with an fmj topology. Importantly, complex 1 can be transformed into complex 2 by the single-crystal to single-crystal transformation of which the coordinated water molecules are replaced with pyz molecules. However, the adsorption abilities of 2 are obviously lower than those of 1, as its pores are partially blocked by pyz molecules. Moreover, gas-adsorption analysis showed that the amino-functional 1 possesses higher gas-adsorption capacity than UMCM-151 for N₂, H₂, CH₄, and C₂H₂, especially for CO₂.