Issue 41, 2024

A uranium-bridged dimeric Keggin-type polyoxometalate and its proton conductive properties

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.

Graphical abstract: A uranium-bridged dimeric Keggin-type polyoxometalate and its proton conductive properties

Supplementary files

Article information

Article type
Communication
Submitted
19 Jul 2024
Accepted
03 Oct 2024
First published
04 Oct 2024

Dalton Trans., 2024,53, 16826-16829

A uranium-bridged dimeric Keggin-type polyoxometalate and its proton conductive properties

Y. Wei, W. Du, H. Wang, X. Wang, K. Shen, M. Xiong and D. Zhang, Dalton Trans., 2024, 53, 16826 DOI: 10.1039/D4DT02077D

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