Abstract
Abstract Hydrothermal treatment of cobalt chloride, 2,2′-biimidazole (H2biim), oxalate acid and NaOH at 160 °C for five days produced a three-dimensional mixed-valence metal-organic framework [CoIII(Hbiim)3]2[CoII3(ox)3]·4H2O ( 1 ). Compound 1 exhibits a 3D network with tri-nodal (3-c)2(4-c)3 topology, in which [CoIII(Hbiim)3] building blocks as 3-connected nodes, and CoII ions as 4-connected nodes. The magnetic measurements reveal that compound 1 exhibits a spin canting antiferromagnetic coupling between adjacent CoII ions.
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