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Updated: Sep 23, 2026

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Dawson-type polyoxometalate-based silver complexes: syntheses, structures, and enhanced electrochemical capacitance
Xin-Yu Liu1, Zimian Niu2, Guanghua Li1
1College of Chemistry and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin 130023, P. R. China. cuixb@mail.jlu.edu.cn.
Abstract:
Four novel Dawson polyoxometalate (POM)-based compounds were synthesized under hydrothermal conditions, [Ag(2,2'-bpy)2]5[HP2W18O62]·H2O (1), [Ag4(4,4'-bpy)4][4,4'-bpy]2[H2P2W18O62]·H2O (2), [Ag(bizm)2]6[P2W18O62]·H2O (3), and [Ag(bizm)2]2(bizm)4[H4P2W18O62]·2H2O (4), (2,2'-bpy = 2,2'-bipyridine, 4,4'-bpy = 4,4'-bipyridine, and bizm = benzimidazole), and were characterized by IR spectroscopy, UV-vis spectroscopy, powder X-ray diffraction (XRD), elemental analysis, and single-crystal X-ray diffraction analysis. Electrochemical performance tests conducted on the four compounds revealed that compound 2 exhibits the most superior capacitive properties, with a specific capacitance of 193.5 F g-1 at a current density of 1.5 A g-1. This study not only enriches the structural diversity of Dawson-POM-based compounds but also offers a viable strategy for enhancing the capacitive properties of POM-based materials.
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