Hydrothermal routes to new sodium hydrogen polytungstates

K.V. Redrup, M.T. Weller

Research output: Contribution to journalArticle

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Abstract

The new acidic sodium polytungstates, Na[HW O]·20HO (1) and Na [HWO]·20H O (2), have been synthesised under hydrothermal conditions where variations of pH and temperature allow control of the protonation of the [W O] cluster in the products. The polytungstate cluster, [HWO] , in each compound consists of the well known polyhedral unit based on 12 edge- and corner-sharing WO octahedra, though the decoration of this unit with varying levels of protons results in significant changes in the W-O distances. The polytungstate clusters exist in arrays separated by sodium ions and water molecules forming well separated, (polytungstate centre to centre distance of 10.87 Å), rhombohedrally stacked units in 1 and strongly hydrogen bonded and more tightly packed units, (centre to centre distance of 9.34 Å), due to the high H: Na ratio in 2.
Original languageEnglish
Pages (from-to)4468-4472
JournalDalton Transactions
Volume2009
Issue number23
Early online date6 Apr 2009
DOIs
Publication statusPublished - 2009

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Hydrogen
Sodium
Protonation
Temperature control
Protons
Ions
Molecules
Water

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Hydrothermal routes to new sodium hydrogen polytungstates. / Redrup, K.V.; Weller, M.T.

In: Dalton Transactions, Vol. 2009, No. 23, 2009, p. 4468-4472.

Research output: Contribution to journalArticle

Redrup, K.V. ; Weller, M.T. / Hydrothermal routes to new sodium hydrogen polytungstates. In: Dalton Transactions. 2009 ; Vol. 2009, No. 23. pp. 4468-4472.
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