Thermal decomposition of the oxo-diperoxo-molibdenum (VI)-potassium oxalate
- 159 Downloads
The oxo-diperoxo-molibdenum(VI)-potassium oxalate, K2[MoO(O2)2(C2O4)] was synthesized using an adapted version of the method suggested by Dengel. The thermal behavior of the synthesized complex was investigated by simultaneous thermal analysis TG/DTG/DTA, in air or nitrogen atmosphere, to identify and characterize the mass-loss decomposition processes. In addition, for the characterization of the observed decomposition steps, the FT-IR spectra for the initial complex, evolved gaseous compounds and isolated complex at 230 and 430/383 °C in air/nitrogen atmosphere, were recorded. On the 35–500 °C temperature range, the K2[MoO(O2)2(C2O4)] complex presented three main decomposition steps, accompanied by mass-loss. The first degradation step is due to the elimination of one oxygen molecule, by the breaking of the peroxo groups, with the formation of an intermediary, like [MoO3L]. The other two degradation steps can be attributed to the decomposition of the organic ligand, with the final formation of a stable metallic oxide.
KeywordsOxo-diperoxo-molibdenum(VI)-potassium oxalate Synthesis Thermal decomposition TG/DTG/DTA analysis FT-IR spectra
This research work was supported by “Bast plants—Renewable Strategic Resources for European Economy”—“BASTEURES” project, No. 210/2010 POS-CCE—supported by Structural Founds—Investment in Your Future.
- 2.Mimoun H, Patai S, et al. The chemistry of peroxides. New York: Wiley; 1983.Google Scholar
- 6.Sîrghie C, Botar B, Botar A, Dincă N. Brevet de Invenţie pentru “Procedeu de albire a pulpei de celuloză, obţinută din fibre naturale celulozice sau materiale celulozice, prin oxidare catalitică cu polioxometalaţi”. RO Patent. 2010;122817.Google Scholar
- 9.Hussain A, Sheikh HN, Kalsotra BL. Synthesis and characterization of mixed ligand complexes of molybdenum(VI). J Indian Chem Soc. 2006;83:531–5.Google Scholar
- 11.Irmawati R, Shafizah M. The production of high purity hexagonal MoO3 through the acid washing of as-prepared solids. Int J Basic Appl Sci. 2009;9(9):241–4.Google Scholar