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Issue 3, 2015
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Two new members of the niobium-substituted polytungstophosphate family based on hexalacunary [H2P2W12O48]12− building blocks

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Abstract

Two structurally novel nanoscale clusters [{Nb6(O2)4P2W12O57}2]20− (1) and [{P2W12Nb7O63(H2O)2}4{Nb4O4(OH)6}]30− (2) were synthesized under specific reaction conditions. Cluster 1 displays an unprecedented di-Nb–O–Nb-linked Wells–Dawson dimer, whilst cluster 2 contains the highest nuclearity niobium containing heteropolyoxometalate to date. Furthermore, 31P and 183W NMR spectra indicate that the polyanion 2 remains stable in solution. The photocatalytic activities of the respective salts 1a, 2a and K6[α-P2W18O62]·14H2O for H2 evolution were evaluated. The enhanced photocatalytic activity of 2a may be attributed to the incorporation of Nb into the polyoxotungstate framework.

Graphical abstract: Two new members of the niobium-substituted polytungstophosphate family based on hexalacunary [H2P2W12O48]12− building blocks

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Article information


Submitted
18 Oct 2014
Accepted
17 Dec 2014
First published
26 Dec 2014

Inorg. Chem. Front., 2015,2, 254-262
Article type
Research Article

Two new members of the niobium-substituted polytungstophosphate family based on hexalacunary [H2P2W12O48]12− building blocks

D. Zhang, C. Zhang, P. Ma, B. S. Bassil, R. Al-Oweini, U. Kortz, J. Wang and J. Niu, Inorg. Chem. Front., 2015, 2, 254 DOI: 10.1039/C4QI00169A

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