The Structure and Catalytic Properties of Coordination Polyhedra of 3d-Metals in Metaphosphate Melts
| Autor: | S. V. Volkov, V. A. Bandur, N. I. Buryak |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Zeitschrift für Naturforschung B. 49:1539-1543 |
| ISSN: | 1865-7117 0932-0776 |
| DOI: | 10.1515/znb-1994-1114 |
| Popis: | By EAS and ESR spectroscopy, oxygenated complexes of d-metals have been established in high-temperature melts NaPO3-Cr2O3-O2 and NaPO3-CoO-O2 and others of the type M(P03)ϰO2, where M is Cr, Co, V, and their structure has been established. The 18O/16O exchange reaction in the NaPO3-V2O5-O2 melt has been studied by mass spectrometry both in the presence of the oxidized substrate and in its absence. A general approach has been proposed explaining the interaction between polyphosphate complexes of 3d-metal ions and molecular oxygen and the oxidation ability of the oxygenated complexes in terms of the MO theory. It has been established three types of interaction between 3d-metal ions and molecular oxygen: donor, acceptor and donor-acceptor ones. Oxygenated complexes of the ions of the midle of the 3d-element series (d4-d7) were found to possess the revealed “partial’' oxidation ability towards alkanes. |
| Databáze: | OpenAIRE |
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