Hexazirconium- and Hexahafnium-Containing Tungstoarsenates(III) and Their Oxidation Catalysis Properties Full article
Journal |
Chemistry - A European Journal
ISSN: 0947-6539 , E-ISSN: 1521-3765 |
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Output data | Year: 2010, Volume: 16, Number: 39, Pages: 11797-11800 Pages count : 4 DOI: 10.1002/chem.201000786 | ||||||
Tags | hafnium, homogeneous catalysis, oxidation, polyoxometalates, zirconium | ||||||
Authors |
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Affiliations |
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Funding (4)
1 | Russian Foundation for Basic Research | 09-03-91333 |
2 | Jacobs University Bremen | |
3 | German Research Foundation | KO 2288/9-4 |
4 | Verband der Chemischen Industrie |
Abstract:
In summary, the two novel polyanions [M6O4(OH)4-(H2O)2(CH3COO)5(AsW9O33)2]11 (M=Zr, 1; Hf, 2) contain
an unprecedented octahedral Zr6/Hf6 assembly that is stabilized by two (B-a-AsW9O33) groups and five bridging acetate ligands. Both compounds were characterized by several techniques in the solid state. NMR studies in solution were also conducted on 1 and 2 in H2O/D2O and MeCN solutions, respectively. The spectra suggest C2v symmetry for the polyanions in solution, most likely due to fluxional behavior of the labile acetate groups. The TBA salts of both 1 and 2 revealed high catalytic activity and selectivity in the liquidphase oxidation of organic compounds with aqueous H2O2.
A heterolytic oxidation mechanism is manifested by the high yields of epoxide and diol in the oxidation of cyclohexene.
We plan to perform additional mechanistic studies to better understand the catalytic behavior of 1 and 2, and also
to prepare other carboxylate and perhaps also peroxo derivatives of the title polyanions.
Cite:
Al-Kadamany G.
, Mal S.S.
, Milev B.
, Donoeva B.G.
, Maksimovskaya R.I.
, Kholdeeva O.A.
, Kortz U.
Hexazirconium- and Hexahafnium-Containing Tungstoarsenates(III) and Their Oxidation Catalysis Properties
Chemistry - A European Journal. 2010. V.16. N39. P.11797-11800. DOI: 10.1002/chem.201000786 WOS Scopus РИНЦ
Hexazirconium- and Hexahafnium-Containing Tungstoarsenates(III) and Their Oxidation Catalysis Properties
Chemistry - A European Journal. 2010. V.16. N39. P.11797-11800. DOI: 10.1002/chem.201000786 WOS Scopus РИНЦ
Dates:
Submitted: | Mar 29, 2010 |
Published online: | Sep 9, 2010 |
Published print: | Oct 18, 2010 |
Identifiers:
Web of science | WOS:000283834500003 |
Scopus | 2-s2.0-78249243067 |
Elibrary | 16710547 |
Chemical Abstracts | 2010:1287942 |
Chemical Abstracts (print) | 154:39055 |
OpenAlex | W2127063435 |