A new honeycomb metal–carboxylate-tetrazolate framework with multiple functions for CO2 conversion and selective capture of C2H2, CO2 and benzene. Issue 9 (7th April 2020)

• Record Type: Journal Article
• Authors: Wang, Gang-Ding; Li, Yong-Zhi; Shi, Wen-Juan; Hou, Lei; Zhu, Zhonghua; Wang, Yao-Yu
• Is Part Of: Inorganic chemistry frontiers. Volume 7:Issue 9(2020)
• Page Start: 1957
• Page End: 1964
• Publication Date: 2020-04-07
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0qi00181c
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : A stable Cd-MOF was built by a carboxylate-tetrazolate ligand, which contains hexagonal channels and reveals multiple functions including separation of CO2 /CH4, C2 H2 /CO2, C2 H2 /CH4 and benzene/cyclohexane, and catalytic conversion of CO2 with epoxides. Abstract : The reaction of 2, 5-di(2H-Tetrazol-5-yl)terephthalic acid (H4 dtztp) and Cd 2+ ions afforded a new three-dimensional (3D) honeycomb framework, [Me2 NH2 ][Cd(dtztp)0.5 (HCOO)]·1.5DMF·H2 O (1 ). 1 contains a unique type of metal–carboxylate–azolate chain SBU and forms hexagonal tubular channels, as well as revealing high adsorption capacity for CO2 and C2 H2, and significantly selective separation of CO2 /CH4, C2 H2 /CO2 and C2 H2 /CH4 . Molecular simulations were performed to study the interactions between the framework and gas molecules. Importantly, 1 shows good thermal stabilities (300 °C), mechanical stabilities and chemical stabilities in acidic (pH = 2) and basic (pH = 12) aqueous solutions. Meanwhile, the MOF as a heterogeneous catalyst can efficiently catalyze the cyclic addition reaction between CO2 and different epoxides to produce cyclic carbonates with high conversion yields. In addition, the selective adsorption of the MOF for benzene over cyclohexane was also studied.