Issue 20, 2018

Synthesis and proton conductivity of two novel molybdate polymers

Abstract

Two novel molybdate polymers, H4[Co(phen)3]2[NaO(H2O)(τ-Mo8O26)]2·2H2O (1) and H4[TEDA] [γ-Mo8O26]·3H2O (2), (phen = 1,10′-phenanthroline, TEDA = triethylene diamine), were successfully synthesized by a hydrothermal method with MoCl5. Single-crystal X-ray diffraction shows that 1 was a dimer-octamolybdate polymer connected by two Na+ cation, and it is the first molybdate dimer-polymer of [τ-Mo8O26]. Compound 2 was an extended 1D octamolybdate chain connected by contiguous [γ-Mo8O26]. Both 1 and 2 have 1D hydrogen-bond chains for proton-conducting pathways and free H+ counter cations as proton donors. These features make them suitable for potential proton-conducting solid crystal materials. The outstanding conductivities of 3.06 × 10−3 S cm−1 for 1 and 4.18 × 10−4 S cm−1 for 2 were achieved at 85 °C under 97% RH.

Graphical abstract: Synthesis and proton conductivity of two novel molybdate polymers

Supplementary files

Article information

Article type
Paper
Submitted
29 Jul 2018
Accepted
16 Aug 2018
First published
01 Sep 2018

New J. Chem., 2018,42, 16516-16522

Synthesis and proton conductivity of two novel molybdate polymers

L. Xu, Z. Wang, Y. Lu, T. Yan, H. Tian, X. Li, S. Wang, X. Sun, Z. Zhang, T. Dang and S. Liu, New J. Chem., 2018, 42, 16516 DOI: 10.1039/C8NJ03781G

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