Concepedia

Publication | Closed Access

A wheel-shaped Zr-substituted phosphotungstate [{Zr(C<sub>2</sub>O<sub>4</sub>)<sub>2</sub>}<sub>3</sub> (PO<sub>4</sub>)(P<sub>6</sub>W<sub>39</sub>O<sub>150</sub>)]<sup>39−</sup> with tunable proton conduction properties

DOI

30

Citations

32

References

2024

Year

Dongsheng Yang, Lihua Liu, Yunfan Zhang, Miao Zhang, Pengtao Ma, Jingping Wang, Jingyang Niu
Chemical Communications

Abstract

A wheel-shaped Zr-substituted phosphotungstate, [N(CH<sub>3</sub>)<sub>4</sub>]<sub>2</sub>K<sub>16</sub>Na<sub>10.5</sub>H<sub>10.5</sub>[{Zr(C<sub>2</sub>O<sub>4</sub>)<sub>2</sub>}<sub>3</sub>(PO<sub>4</sub>)(P<sub>6</sub>W<sub>39</sub>O<sub>150</sub>)]·45H<sub>2</sub>O (1), was synthesised from a hexavacant Dawson-type precursor [H<sub>2</sub>P<sub>2</sub>W<sub>12</sub>O<sub>48</sub>]<sup>12-</sup><i>via</i> a conventional solution method. Compound 1 features a wheel-shaped polyanion comprising an annular [P<sub>6</sub>W<sub>39</sub>O<sub>150</sub>]<sup>36-</sup> cluster supported by a turbine-shaped [{Zr(C<sub>2</sub>O<sub>4</sub>)<sub>2</sub>}<sub>3</sub>(PO<sub>4</sub>)]<sup>3-</sup> fragment, with three oxalate groups covalently anchored to W atoms. Compound 1 was systematically characterized by IR, UV, PXRD, TGA and <sup>31</sup>P NMR spectra. The <sup>31</sup>P NMR spectra over time were monitored to verify the stability of 1 in aqueous solution. This compound possesses remarkable proton conductive behavior with a high conductivity of 1.18 × 10<sup>-2</sup> S cm<sup>-1</sup> at 368 K.

References

YearCitations

Page 1