Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
674613 | Thermochimica Acta | 2011 | 5 Pages |
Abstract
The compounds M[VO(O2)2bpy]·nH2O (M = Li+–Rb+) and Cs[VO(O2)2bpy]·H2O2 were characterized by thermogravimetry (TG). In the course of TG experiments, performed from 25 up to 550 °C, three main stages of decomposition were observed: (i) dehydration, (ii) releasing of the oxygen molecules and (iii) decomposition of bpy. The final product of decomposition is MVO3, with small amounts of paramagnetic vanadium(IV) species. Volatile products were detected on-line using mass spectrometer. Mechanism of the decomposition is discussed on the basis of crystal structures of complexes. The main role is played by hydrogen bonds involving peroxo ligands and polarising power of alkali metal ions.
Keywords
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Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Wojciech Przybylski, Ryszard Gryboś, Dorota Majda, Janusz T. Szklarzewicz,