Authors:F. J. Caires, L. S. Lima, C. T. Carvalho, A. B. Siqueira, Oswaldo Treu-Filho, and M. Ionashiro
have been used to characterize complexes of bivalenttransitionmetal ions [ 9 , 10 ]. However, they are not found in the literature thermal studies involving all metal-ions with oxamates, as well as the characterization of the gaseous products
Authors:M. Kobelnik, E. Schnitzler, and M. Ionashiro
Solid-state M-2-MeO-BP compounds, where M represents bivalent Mn, Fe, Co, Ni, Cu, Zn and 2-MeO-BP is 2-methoxybenzylidenepyruvate have been synthesized. Simultaneous
thermogravimetry-differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry,
infrared spectroscopy, elemental analysis and complexometry were used to characterize and to study the thermal stability and
thermal decomposition of these compounds. The results led to information about the composition, dehydration, crystallinity
and thermal decomposition of the isolated compounds.
The thermal decompositions of dehydrated or anhydrous bivalent transition metal (Mn, Fe, Co, Ni, Cu, Zn, Cd) and alkali rare
metal (Mg, Ca, Sr, Ba) methanesulfonates were studied by TG/DTG, IR and XRD techniques in dynamic Air at 250–850 °C. The initial
decomposition temperatures were calculated from TG curves for each compound, which show the onsets of mass loss of methanesulfonates
were above 400 °C. For transition metal methanesulfonates, the pyrolysis products at 850 °C were metal oxides. For alkali
rare metal methanesulfonates, the pyrolysis products at 850 °C of Sr and Ba methanesulfonates were sulphates, while those
of Mg and Ca methanesulfonate were mixtures of sulphate and oxide.
Authors:Xuehang Wu, Wenwei Wu, Xuemin Cui, and Sen Liao
made. Recently, bivalenttransitionmetal vanadates with brannerite structure MV 2 O 6 (M = Zn, Mn, Co, Cu, and Ni) compounds have been promoted as alternative anode of lithium ion rechargeable batteries [ 7 – 10 ], which is attributed to its higher