Thermal Behaviour Studies of Solid State Lanthanide (III) and Yttrium (III) Compounds of Cinnamylidenepyruvic Acid in an Atmosphere of Air

Abstract

Compostos Ln-CP foram preparados no estado sólido, onde Ln representa os lantanídios trivalentes (exceto promécio) e itrio e CP é o cinamalpiruvato. As técnicas termogravimetria (TG), calorimetria exploratória diferencial (DSC), difratometria de raios X e complexometria foram utilizadas para caracterizar e estudar o comportamento térmico destes compostos. Os resultados proporcionaram informações com respeito a desidratação, estabilidade e decomposição térmica.Solid state Ln-CP compounds, where Ln represents trivalent lanthanides (except for promethium) and yttrium, and CP is cinnamylidenepyruvate, were prepared. Thermogravimetry (TG), differential scanning calorimetry (DSC), X-ray diffraction powder patterns and complexometry were used to characterize and to study the thermal behaviour of these compounds. The results provide information about dehydration, thermal stability and thermal decomposition.

Synthesis, characterization and thermal behaviour of solid 2-methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres

“…Several metal-ion complexes of phenyl-substituted derivatives of cinnamylidenepyruvate, C H - 6 5 -(CH) -COCOO (CP), have been investigated in 4 aqueous solutions [1][2] and in the solid state [3][4][5][6][7][8][9][10][11]. These works reported the thermodynamic stability (â ), and spectroscopic parameters (å , ë ) in atmospheres have not been reported.…”

Synthesis, characterization and thermal behaviour of solid 2-methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres

“…Several metal-ion complexes of phenyl-substituted derivatives of cinnamylidenepyruvate, C H - 6 5 -(CH) -COCOO (CP), have been investigated in 4 aqueous solutions [1][2] and in the solid state [3][4][5][6][7][8][9][10][11]. These works reported the thermodynamic stability (â ), and spectroscopic parameters (å , ë ) in 1 1max max aqueous solutions associated with 1:1 complex species.…”

Synthesis, characterization and thermal behaviour of solid 2-methoxycinnamylidenepyruvate of light trivalent lanthanides

“…2 Several metal ion complexes of phenyl-substituted derivatives of cinnamylidenepyruvate, C 6 H 5 (CH) 4 C(O)COO -(CP), have been investigated in aqueous solutions 3 and in the solid state. [4][5][6][7][8][9] These works reported the thermodynamic stability (β 1 ) and spectroscopic parameters (ε 1max , λ 1max ) in aqueous solutions associated with 1:1 complex species. They also report the synthesis and investigation of the compounds in the solid state by means of thermogravimetry (TG), differential thermal analysis (DTA), differential scanning calorimetry (DSC), X-ray powder diffractometry and other methods of analysis.…”