Preparação e caracterização do complexo sólido de estanho(II)-EDTA e influência do tratamento térmico sobre a morfologia do resíduo SnO2
Main Article Content
Abstract
A síntese do complexo sólido de estanho(II)-EDTA é descrita e sua caracterização efetuada através da análise elementar, espectroscopia de absorção na região do infravermelho, difratometria de raios X e ressonância magnética nuclear de ¹H e 13C. O comportamento térmico é avaliado através das curvas termogravimétricas TG e de análise térmica diferencial DTA em atmosferas inerte e oxidante sugerindo etapas de decomposição térmica para o quelato de estequiometria [H2SnH2O(NCH2(CH2COO)2)2].¹/2H2O. As microscopias eletrônicas de varredura demonstram diferentes morfologias para os resíduos óxidos obtidos a 1200ºC em função da razão de aquecimento utilizada.
Metrics
Article Details
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 Quim., after having the consent of all authors, which ceases if the manuscript is rejected or withdrawn during the review process.
When a published manuscript in EQJ is also published in other journal, it will be immediately withdrawn from EQ and the authors informed of the Editor decision.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
AIME, S.; GOBETTO, R.; NANO, R.; SANTUCCI, E. 13C solid state CP/MAS NMR studies of edta complexes. Inorg. Chim. Acta, v.129, p.L23-L25, 1987.
BHAT, T. R.; IYER, R. K. Studies on edta complexes-VIII. Thermal behaviour in air and in nitrogen atmosphere of some metal-edta complexes. J. Inorg. Nucl. Chem., v.29, p.179-185, 1967.
BOTTARI, E.; LIBERTI, A.; RUFOLO, A. Potentiometric investigation of complexes between tin(II) and edta. J. Inorg. Nucl. Chem., v.30, p.2173-2179, 1968.
ESTEBAN, M. F. G.; SERRANO, V.; VILCHEZ, F. G. Synthesis and vibrational study of some polydentate ligands. Spectrochim. Acta, Part A, v.43(A), p.1039-1043, 1987.
LANGER, H. G. The chemistry of tin(II) chelates-I. Solid chelates of tin(II) with ethylenediaminetetra-acetic acid (edta). J. Inorg. Nucl. Chem., v.26, p.767-772, 1964.
LANGER, H. G.; BOGUCKI, R. F. The chemistry of tin(II) chelates-II. The tin(II) ethylenediaminetetra-acetic acid system in aqueous solution. J. Inorg. Nucl. Chem., v.29, p.495-502, 1967.
LANGER, H. G.; BOGUCKI, R. F. The oxidation and hydrolysis on tin(II) and tin(IV) chelates of ethylenediaminetetra-acetic acid. J. Chem. Soc., A, v.9, p.1516, 1967.
McCONNELL, A. A.; NUTTAL, R. H. The vibrational and nmr spectra of bidentate edta complexes of palladium(II). Inorg. Chim. Acta, v.19, p.253-256, 1976.
_____.The vibrational spectra of edta complexes of divalent tin and lead. Spectrochim. Acta, v..33A, p.459-462, 1977.
NOVAK, A.; COTRAIT M.; JOUSSOT-DUBIEN J.; LASCOMBE, J. Étude par spectroscopie infrarouge de lacide éthylène diamine tétraacétique et de ses dérivés à létat solide. Bull. Soc. Chim. France, v.5, p.1440-1445, 1965.
POWDER DIFFRACTION FILE PDF-2 Dattabase. Pensylvania: Joint Commitee on Powder Diffraction Standard. International Center for Diffraction Data, 1988, file 41-1445.
POUCHERT, C. J. The aldrich library of NMR spectra. 2.ed. Milwaukee: Aldrich Chemical Company. 1983. 484p.
SILVERSTEIN, R. M.; BASSLER, G. C.; MORRIL, T. C. Identificação espectrométrica de compostos orgânicos. 3.ed. Rio de Janeiro: Editora Guanabara Dois. 1979. p.74-94.
SMITH, B. B.; SAWYER, D. T. Proton nuclear magnetic resonance studies of some ethylenediaminetetraacetic acid and ethylenediaminediacetic acid complexes of palladium(II). Inorg. Chem., v.8, p.1154-1159, 1969.
VAN REMOORTERE, F. P.; FLYNN, J. J.; BOER, F. P.; NORTH, P. P. The crystal structure of distannous ethylenediaminetetraacetate dihydrate. Inorg. Chem., v.10, p.1511-1518, 1971.
VAN REMOORTERE, F. P.; FLYNN, J. J.; BOER, F. P. The crystal structure of stannic ethylenediaminetetraacetate monohydrate. Inorg. Chem., v.10, p.2313-2319, 1971.