Thermal decomposition study of [MCu(C3H2O4)2(H2O)n] phases (M is Ca (n = 3), Sr and Ba (n = 4))

Study of the Two-Dimensional [MM‘(C3H2O4)2(H2O)4] (M = Ba, Sr and M‘ = Cu, Mn) Systems: Synthesis, Structure, Magnetic Properties, and Thermal Decomposition

“…For the strontium-copper system, the CuO and SrCO 3 compounds were present in the inorganic up to until 600 °C. The Cu 2 SrO 3 oxide was detected together with SrCO 3 at 700 °C, and finally, the SrCuO 2 phase 34 was obtained as pure phase after a thermal treatment of 800 °C for 3 h. This phase was indexed with the space group Cmcm and the unit cell parameters a ) 3.575(1), b ) 16.370 (7), and c ) 3.915(1) Å. Its structure can be described as an intergrowth of simple rock salt layers and an oxygen deficient ReO 3 -type shear structure.…”

“…In the past few years, mixed oxides with transition metals have been widely investigated because of their electrical and magnetic properties, in areas such as superconductivity or magnetoresistance. − Traditionally, the ceramic method has been employed to get mixed oxides. Nevertheless, and in some cases, thermal decomposition of heterometallic complexes has been discovered to be a more advantageous way. , In this sense, different compounds containing edta, oxalate, tartrate, and malonate as ligands have been synthesized and used as precursors. , As a result, the oxides obtained from these precursors were formed at heating times that were shorter and temperatures that were lower than those of other methods. In addition, the use of soft chemical routes can yield homogeneous phases with small grain size …”

“…4,5 In this sense, different compounds containing edta, oxalate, tartrate, and malonate as ligands have been synthesized and used as precursors. 6,7 As a result, the oxides obtained from these precursors were formed at heating times that were shorter and temperatures that were lower than those of other methods. In addition, the use of soft chemical routes can yield homogeneous phases with small grain size.…”