Periodates of tetravalent titanium, zirconium, hafnium and thorium: Synthesis, characterisation and EXAFS study
Periodates of tetravalent titanium, zirconium, hafnium and thorium: Synthesis, characterisation and EXAFS study
Reaction of TiO(SO4)(.)xH(2)O with periodic acid in aqueous solution at pH = 2 yields a precipitate of Ti(2)O(2)HIO(6)(.)5H(2)O, while reaction of zirconyl, hafnyl or thorium nitrate with periodic acid in hot aqueous nitric acid solutions yields MHIO(6)(.)xH(2)O (M = Zr, Hf, Th; x = 4 or 5). The thorium periodate is soluble in aqueous KOH and KThIO(6)(.)4H(2)O can be precipitated from these solutions. The zirconium, hafnium and both thorium periodates are shown by EXAFS to consist of edge-sharing chains of MO8 and IO6 units, IR and Raman studies indicate protonation of periodate in the MHIO6 modifications. The titanium periodate contains vertex-sharing 106 groups.
periodates, polyoxometalates, exafs spectroscopy, group 4 elements, thoriumalkali-metal, complexes, stabilization, chemistry
3365-3370
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
19 August 2005
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Hector, Andrew L. and Levason, William
(2005)
Periodates of tetravalent titanium, zirconium, hafnium and thorium: Synthesis, characterisation and EXAFS study.
European Journal of Inorganic Chemistry, (16), .
(doi:10.1002/ejic.200500169).
Abstract
Reaction of TiO(SO4)(.)xH(2)O with periodic acid in aqueous solution at pH = 2 yields a precipitate of Ti(2)O(2)HIO(6)(.)5H(2)O, while reaction of zirconyl, hafnyl or thorium nitrate with periodic acid in hot aqueous nitric acid solutions yields MHIO(6)(.)xH(2)O (M = Zr, Hf, Th; x = 4 or 5). The thorium periodate is soluble in aqueous KOH and KThIO(6)(.)4H(2)O can be precipitated from these solutions. The zirconium, hafnium and both thorium periodates are shown by EXAFS to consist of edge-sharing chains of MO8 and IO6 units, IR and Raman studies indicate protonation of periodate in the MHIO6 modifications. The titanium periodate contains vertex-sharing 106 groups.
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Published date: 19 August 2005
Keywords:
periodates, polyoxometalates, exafs spectroscopy, group 4 elements, thoriumalkali-metal, complexes, stabilization, chemistry
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Local EPrints ID: 20821
URI: http://eprints.soton.ac.uk/id/eprint/20821
ISSN: 1434-1948
PURE UUID: cf7d6626-cee0-4b21-95ff-9c60e6d3a3fa
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Date deposited: 01 Mar 2006
Last modified: 16 Mar 2024 02:53
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