Jump to main content
Jump to site search

Issue 12, 2011
Previous Article Next Article

Alpha and beta isomers of tetrahafnium(IV) containing decatungstosilicates, [Hf4(OH)6(CH3COO)2(x-SiW10O37)2]12 (x = α, β)

Author affiliations

Abstract

The two dimeric, Hf-containing tungstosilicates [Hf4(OH)6(CH3COO)2(α-SiW10O37)2]12 (1) and [Hf4(OH)6(CH3COO)2(β-SiW10O37)2]12 (2) have been synthesized by reacting HfCl4 with [γ-SiW10O36]8 in potassium acetate solutions at pH = 3.6 and 4.8, respectively. Polyanions 1 and 2 comprise a tetrahafnium(IV) assembly {Hf4(OH)6(CH3COO)2} sandwiched between two dilacunary [α-SiW10O36]8 (in 1) or {β-SiW10} (in 2) Keggin type decatungstosilicates. This implies that the starting precursor {γ-SiW10} isomerizes in situ to [β-SiW10O37]10 and then to [α-SiW10O37]10 by controlled variation of pH and temperature. The hydrated potassium salts of 1 and 2 were investigated in the solid state by single-crystal XRD, FT-IR, thermogravimetric and elemental analyses, and in solution by UV-Vis and 183W NMR spectroscopy, and electrochemistry.

Graphical abstract: Alpha and beta isomers of tetrahafnium(iv) containing decatungstosilicates, [Hf4(OH)6(CH3COO)2(x-SiW10O37)2]12− (x = α, β)

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Nov 2010, accepted on 07 Jan 2011 and first published on 11 Feb 2011


Article type: Paper
DOI: 10.1039/C0DT01543A
Citation: Dalton Trans., 2011,40, 2920-2925
  •   Request permissions

    Alpha and beta isomers of tetrahafnium(IV) containing decatungstosilicates, [Hf4(OH)6(CH3COO)2(x-SiW10O37)2]12 (x = α, β)

    A. S. Assran, S. S. Mal, N. V. Izarova, A. Banerjee, A. Suchopar, M. Sadakane and U. Kortz, Dalton Trans., 2011, 40, 2920
    DOI: 10.1039/C0DT01543A

Search articles by author

Spotlight

Advertisements