A porous the-type metal-organic framework based on [Mn4Cl]7 + clusters for selective gas sorption |
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| Affiliation: | 1. Stiftung Institut für Werkstofftechnik (IWT), Bremen, Germany;2. CONICET and University of Buenos Aires, Argentina;1. Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab, 140001, India;2. Department of Applied Science & Humanities, Jawaharlal Nehru Govt. Eng. College, Sundernagar, India;3. Department of Chemistry, Yonsei University, Wonju 26493, Republic of Korea;1. Department of Chemistry, Changchun Normal University, Changchun 130032, People’s Republic of China;2. Samara Center for Theoretical Materials Science (SCTMS), Samara National Research University, Ac. Pavlov St 1, Samara 443011, Russia;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;2. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China;3. Neutron Scattering Laboratory, China Institute of Atomic Energy, Beijing 102413, China |
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| Abstract: | An anionic cage-type metal–organic framework, {(Me2NH2)5[Mn4Cl(BTB)4(H2O)4](DMF)2(EtOH)7}n (1, DMF = N,N-Dimethylformamide), has been successfully prepared by the reaction of MnCl2 with trigonal planar 4,4′,4″-benzene-1,3,5-triyl-tri-benzoic acid (H3BTB) ligand under solvothermal conditions. Its structure was characterized by single-crystal X-ray diffraction techniques, which reveal that it is constructed by cross-linking BTB3 − ligands with the in situ-generated square-planar [Mn4Cl]7 + secondary building units. The free space of 1 is formed by packing of octahedral and cuboctahedral cages, and the overall framework exhibits a 2-fold interpenetrated the-type topology. N2 adsorption isotherm at 77 K confirmed the permanent porosities of the activated 1 and the variable-temperature adsorption measurements of CO2 and CH4 revealed its high adsorption abilities of CO2 over CH4 at room temperature. |
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