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Updated: Dec 30, 2025

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Two CoII Metal-Organic Frameworks Based on a Multicarboxylate Ligand as Electrocatalysts for Water Splitting
Yun Gong1, Zhi Hao1, Jiangping Meng1
1Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030 (P. R. China).
Abstract:
By using a rigid multicarboxylate ligand, 4,5-di(4'-carboxylphenyl)phthalic acid (H4 L), two CoII complexes formulated as [Co4 L2 (4,4'-bpy)(H2 O)6 ]⋅3.5 H2 O (4,4'-bpy=4,4'-bipyridine) (1) and [Co2 L(azene)(H2 O)3 ]⋅DMF (azene=(E)-1,2-di(pyridin-4-yl)diazene, DMF=dimethylformamide) (2) have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 features a novel three-nodal (4,5,6)-connected 2 D framework with an unusual (32 .42 .5.63 .7.8)(32 .42 .5.6)(32 .46 .52 .64 .7) topology. Complex 2 exhibits a novel two-nodal (4,7)-connected 3 D framework with an unusual (43 .5.62 )(45 .55 .69 .7.8) topology. Ligand L4- displays different coordination modes in the two complexes. The complexes both exhibit electrocatalytic activities toward generating H2 and O2 from water with lowered overpotentials and enhanced currents. The different electrocatalytic properties of the two complexes are related to their different ligands and frameworks.
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