Abstract
The present investigation refers to nanostructured mixed metal oxides—more specifically to iron–molybdenum oxides most simply obtained by addition of iron(III) chloride to an aqueous solution of sodium molybdate acidified with acetic acid. The immediately obtained yellow non-crystalline solid consists of highly symmetrical icosahedral {Mo72Fe30} motifs which is proven by IR, Raman, 57Fe Mössbauer and XP spectra. This remarkable result is obtained in spite of the immediate precipitation of the mentioned compound and even from an inhomogeneous mixture of the educts. This again proves the high formation tendency of spherical clusters. The procedure offers in principle the option to encapsulate species present in solution.
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Acknowledgments
We thank Prof. Dr. E. Diemann for valuable discussions and S. Garai for some help. A.M. acknowledges the Deutsche Forschungsgemeinschaft for continuous financial support and the European Research Council (Brussels) for an Advanced Grant. A.J.M.Al–K. acknowledges the DAAD and A.G. the Alexander von Humboldt Foundation for fellowships. P.G. acknowledges support from the Université Pierre et Marie Curie and the Centre National de la Recherche Scientifique.
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Dedicated to Prof. Ronny Neumann on the occasion of his 60th birthday.
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Kuepper, K., Neumann, M., Al-Karawi, A.J.M. et al. Immediate Formation/Precipitation of Icosahedrally Structured Iron–Molybdenum Mixed Oxides from Solutions Upon Mixing Simple Iron(III) and Molybdate Salts. J Clust Sci 25, 301–311 (2014). https://doi.org/10.1007/s10876-013-0668-y
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DOI: https://doi.org/10.1007/s10876-013-0668-y