An unprecedented twelve-connected 3D metal-organic framework based on heptanuclear cobalt cluster building blocks |
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| Affiliation: | 1. State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China;2. Department of Chemistry, Bengbu Medical College, Bengbu 233030, PR China;1. Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin 150025, China;2. Key Laboratory of Synthesis of Functional Materials and Green Catalysis, Colleges of Heilongjiang Province, Harbin Normal University, Harbin 150025, China;3. Department of Biochemical Engineering, Harbin Institute of Technology, Harbin 150090, China |
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| Abstract: | Solvothermal reaction of flexible tetrapodal linker tetrakis[4-(carboxyphenyl) oxamethyl]methane acid (H4L) with cobalt salt yields a new metal-organic framework [Co7(L)3(μ3-O)3(DMF)3]∙(DMF)13(H2O)25. X-ray crystallography reveals that the structure exhibits a unique 2-nodal (4,12)-connected topology with the Schläfli symbol of (433.630.83)(46)3, constructed from heptanuclear cobalt clusters as 12-connected nodes and tetrahedral ligands as 4-connected nodes. Temperature-dependent magnetic susceptibility measurements reveal that the heptanuclear cobalt clusters exhibit antiferromagnetic property. |
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