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.07.015 . 24. Caires , FJ , Lima , LS , Carvalho , CT , Giagio , RJ , Ionashiro , M . Thermal behaviour of malonic acid, sodium malonate and its compounds with some bivalent transition metal ions . Thermochim Acta . 2010

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have been used to characterize complexes of bivalent transition metal 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

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Solid-state compounds of 2-methoxybenzylidenepyruvate with some bivalent metal ions

Synthesis, characterization and thermal behavior studies

Journal of Thermal Analysis and Calorimetry
Authors: M. Kobelnik, E. Schnitzler, and M. Ionashiro

Abstract  

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.

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Abstract  

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.

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. Caires , FJ , Lima , LS , Carvalho , CT , Giagio , RJ , Ionashiro , M . Thermal behavior of malonic acid, sodium malonate and its compounds with some bivalent transition metal ions . Thermochimica Acta . 2010 ; 497 : 35 – 40 . 10.1016/j

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made. Recently, bivalent transition metal 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

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