Thermal behaviour studies of solid state compounds of cinnamylidenepyruvate with trivalent lanthanides and yttrium (III) in an atmosphere of CO2
Main Article Content
Abstract
Solid state cinnamylidenepyruvate of trivalent lanthanides (except for promethium) and yttrium, were prepared. Thermogravimetry, derivative thermogravimetry (TG, DTG), differential scanning calorimetry (DSC), X-ray diffraction powder patterns and complexometry were used to characterize and to study the thermal behavior of these compounds in a dynamic CO2 atmosphere. The results obtained showed significative differences on the thermal stability and thermal decomposition of these compounds, with regard to the thermal behavior study in a dynamic air atmosphere.
Metrics
Article Details
![Creative Commons License](http://i.creativecommons.org/l/by/4.0/88x31.png)
This work is licensed under a Creative Commons Attribution 4.0 International License.
The corresponding author transfers the copyright of the submitted manuscript and all its versions to Eclet. Quim., after having the consent of all authors, which ceases if the manuscript is rejected or withdrawn during the review process.
When a published manuscript in EQJ is also published in other journal, it will be immediately withdrawn from EQ and the authors informed of the Editor decision.
Self-archive to institutional, thematic repositories or personal webpage is permitted just after publication. The articles published by Eclet. Quim. are licensed under the Creative Commons Attribution 4.0 International License.
References
LELES, M.I.G.; SCHNITZLER, E.; CARVALHO FILHO, M.A.S.; FERNANDES, N.S.; MELIOS, C.B.; IONASHIRO, M. Preparation and thermal decomposition of the solid state compounds of 4-dimethylaminocinnamylidenepyruvate with trivalent lanthanides and yttrium. An. Assoc. Bras. Quím., v. 48, p. 37-42, 1999. [ Links ]
MARQUES, R.N.; MELIOS, C.B.; PEREIRA, N.C.S.; SIQUEIRA, O.S.; MORAES, M.; MOLINA, M.; IONASHIRO, M. Complexation of some trivalent lanthanides, scandium (III) and thorium (IV) by benzylidenepyruvates in aqueous solutions. J. Alloys Comp., v. 249, p. 102-105, 1997. [ Links ]
MELIOS, C.B.; TORRES, V.R.; MOTA, M.H.A.; TOGNOLLI, J.O.; MOLINA, M. Spectrophotometric study of binary and ternary systems involving metal ions and benzylidenepyruvate: Equilibria in aqueous solutions. Analyst, v. 109, p. 385-389, 1984. [ Links ]
MELIOS, C.B.; CAMPOS, J.T.S.; MAZZEU, M.A.C.; CAMPO, L.L.; MOLINA, M.; TOGNOLLI, J.O. Complexation of trivalent lanthanides and yttrium by benzylidenepyruvate in aqueous solutions. Inorg. Chim. Acta, v. 139, p. 163-168, 1987. [ Links ]
MELIOS, C.B.; IONASHIRO, M.; REDIGOLO, H.; MIYANO, M.H.; MOLINA, M. Complexation of trivalent lanthanides and other metal ions by 4-methoxybenzylidenepyruvate in aqueous solution. Eur. J. Solid State Inorg. Chem., v. 28, p. 291-294, 1991. [ Links ]
MENDES, R.A.; CARVALHO FILHO, M.A.S.; FERNANDES, N.S.; MOSCARDINI DASSUNÇÃO, L.; MELIOS, C.B.; IONASHIRO, M. Preparation, characterization and thermal behavior studies of solid state compounds of 4-chlorobenzylidenepyruvate with Mn(II), Fe(II) and Ni(II). An. Assoc. Bras. Quím., v. 47, p. 329-332, 1998. [ Links ]
MIYANO, M.H.; MELIOS, C.B.; RIBEIRO, C.A.; REDIGOLO, C.A.; IONASHIRO, M. The preparation and thermal decomposition of solid state compounds of 4-dimethylaminobenzylidenepyruvate and trivalent lanthanides and yttrium. Thermochim. Acta, 221, p. 53-62, 1993. [ Links ]
OLIVEIRA, L.C.S.; MELIOS, C.B.; CRESPI, M.S.; RIBEIRO, C.A.; IONASHIRO, M. Preparation and thermal decomposition of solid state compounds of 4-methoxybenzylidenepyruvate and trivalent lanthanides and yttrium. Thermochim. Acta, v. 219, p. 215-224, 1993. [ Links ]
OLIVEIRA, L.C.S.; RASERA, D.E.; SIQUEIRA, O.S.; MATOS, J.R.; MELIOS, C.B.; IONASHIRO, M. Preparation and thermal decomposition of solid state compounds of 4-methoxybenzylidenepyruvate with alkali earth metals, except beriullium and rodium. Thermochim. Acta, v. 275, p. 269-278, 1996. [ Links ]
OLIVEIRA, L.C.S.; RASERA, D.E.; OLIVEIRA, J.D.S.; MELIOS, C.B.; IONASHIRO, M. Thermal behavior studies of solid state compounds of 4-methoxybenzylidenepyruvate with some transition metals in platinum or alumina crucibles. An. Assoc. Bras. Quím., v. 47, p. 75-80, 1998. [ Links ]
OLIVEIRA, J.D.S.; LELES, M.I.G.; D'ASSUNÇÃO, L.M.; MELIOS, C.B.; IONASHIRO, M. Thermal behavior studies of solid state lanthanides (III) and yttrium (III) compounds of cinnamylidenepyruvic acid in an atmosphere of air. J. Braz. Chem. Soc., v. 10, p. 209-213, 1999. [ Links ]
PEREIRA, N.C.S.; MELIOS, C.B.; MARQUES, R.N.; SIQUEIRA, O.S.; MORAES, M.; MOLINA, M.; IONASHIRO, M. 4-Dimethylaminocinnamylidenepyruvic acid: Synthesis, characterization and complexation with trivalent lanthanides, yttrium (III), scandium (III), thorium (IV) and uranium (VI) in aqueous solution. J. Alloys Comp., p. 249, p. 94-98, 1997. [ Links ]
RASERA. D.E.; OLIVEIRA, L.C.S.; MELIOS, C.B.; IONASHIRO, M. The preparation and thermal decomposition of some metal compounds of 4-dimethylaminobenzylidenepyruvate in solid state. Thermochim. Acta, v. 250, p. 151-163, 1995. [ Links ]
SCHNITZLER, E.; MELIOS, C.B.; IONASHIRO, M. Preparation and thermal decomposition of solid state compounds of 4-methoxybenzylidenepyruvate and 4-dimethylaminocinnamylidenepyruvate with iron (III) and chromium (III). An. Assoc. Bras. Quím., v. 47, p. 326-328, 1998. [ Links ]
SIQUEIRA, O.S.; MELIOS, C.B.; IONASHIRO, M.; MORAES, M.; MOLINA, M. Complexation of some trivalent lanthanides, scandium (III) and thorium (IV) by benzylidenepyruvate in aqueous solution. J. Alloys Comp., v. 225, p. 267-270, 1995. [ Links ]