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Updated: Jun 10, 2025
High Resolution Physical Characterization of Single Metallic Nanoparticles
Published on: June 28, 2019
A uranium-bridged dimeric Keggin-type polyoxometalate and its proton conductive properties
Yuting Wei1, Weixin Du1, Haiying Wang1
1Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, China. hywang@henu.edu.cn.
Abstract:
A novel dimeric structure based on trilacunary Keggin-type [SbW9O33]9- was synthesized and comprehensively characterized. Different from the conventional dimeric structures, the compound (NH4)10[(SbW9O33)2(UO2)2(H2O)2(SbOH)2]·7H2O ({U2Sb4}) features two additional Sb3+ cations. The successful synthesis of {U2Sb4} reveals the significant role of heteroatoms in structural modulation. The dimer forms a hydrogen-bonded network with water molecules and NH4+ and is therefore expected to exhibit remarkable proton conductivity. Proton conduction studies revealed that {U2Sb4} was a temperature and humidity-dependent proton conductor with conductivity reaching up to 2.50 × 10-2 S cm-1 at 85 °C and 85% RH.
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