Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s10973-018-7373-x http://hdl.handle.net/11449/171082 |
Resumo: | Coordination compounds of heavier lanthanides with terephthalate ligand have been synthesized and characterized employing simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), TG coupled to FTIR, elemental analysis and complexometry. The results from complexometry with EDTA and from TG curves allowed to establish the stoichiometry of these compounds, which are in agreement with the Ln2(TFTa)3·nH2O general formula where Ln represents trivalent lanthanides or yttrium, TFTA is terephthalate and n = 4 (Er, and Y); 4.5 (Tb, Dy, Ho and Tm); 5 (Yb) and 6.5 (Lu). The thermal decomposition of the anhydrous compounds occurs in two or three consecutive and/or overlapping steps, with the formation of the respective oxides: Tb4O7 and Ln2O3 (Ln = Dy to Lu and Y). The TG-FTIR of the evolved gases obtained from the thermal decomposition of the synthesized compounds, identified the formation of CO2 and water as main gaseous products. The FTIR results also led to information about the type of coordination of the isolated compounds which suggest that the lanthanides are linked to the carboxylate groups by a bridging bond. |
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Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphereHeavier lanthanidesLanthanides coordination compoundsTerephthalateThermal behaviorCoordination compounds of heavier lanthanides with terephthalate ligand have been synthesized and characterized employing simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), TG coupled to FTIR, elemental analysis and complexometry. The results from complexometry with EDTA and from TG curves allowed to establish the stoichiometry of these compounds, which are in agreement with the Ln2(TFTa)3·nH2O general formula where Ln represents trivalent lanthanides or yttrium, TFTA is terephthalate and n = 4 (Er, and Y); 4.5 (Tb, Dy, Ho and Tm); 5 (Yb) and 6.5 (Lu). The thermal decomposition of the anhydrous compounds occurs in two or three consecutive and/or overlapping steps, with the formation of the respective oxides: Tb4O7 and Ln2O3 (Ln = Dy to Lu and Y). The TG-FTIR of the evolved gases obtained from the thermal decomposition of the synthesized compounds, identified the formation of CO2 and water as main gaseous products. The FTIR results also led to information about the type of coordination of the isolated compounds which suggest that the lanthanides are linked to the carboxylate groups by a bridging bond.Instituto de Química UFG Campus IIUniversidade Federal de Mato Grosso UFMT – Campus CuiabáInstituto de Química UNESP Campus de Araraquara – UNESPFaculdade de Ciências UNESP – Campus BauruInstituto de Química UNESP Campus de Araraquara – UNESPFaculdade de Ciências UNESP – Campus BauruUFGUFMT – Campus CuiabáUniversidade Estadual Paulista (Unesp)Costa, B. A.Nunes, W. D.G. [UNESP]Bembo, L. H.Siqueira, A. B.Caires, F. [UNESP]Leles, M. I.G.Ionashiro, E. Y.2018-12-11T16:53:49Z2018-12-11T16:53:49Z2018-06-04info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-6application/pdfhttp://dx.doi.org/10.1007/s10973-018-7373-xJournal of Thermal Analysis and Calorimetry, p. 1-6.1588-29261388-6150http://hdl.handle.net/11449/17108210.1007/s10973-018-7373-x2-s2.0-850480054872-s2.0-85048005487.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Thermal Analysis and Calorimetry0,5870,587info:eu-repo/semantics/openAccess2023-11-13T06:07:42Zoai:repositorio.unesp.br:11449/171082Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:31:34.856045Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere |
title |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere |
spellingShingle |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere Costa, B. A. Heavier lanthanides Lanthanides coordination compounds Terephthalate Thermal behavior |
title_short |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere |
title_full |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere |
title_fullStr |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere |
title_full_unstemmed |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere |
title_sort |
Study of thermoanalytical behavior of heavier lanthanides terephthalates in air atmosphere |
author |
Costa, B. A. |
author_facet |
Costa, B. A. Nunes, W. D.G. [UNESP] Bembo, L. H. Siqueira, A. B. Caires, F. [UNESP] Leles, M. I.G. Ionashiro, E. Y. |
author_role |
author |
author2 |
Nunes, W. D.G. [UNESP] Bembo, L. H. Siqueira, A. B. Caires, F. [UNESP] Leles, M. I.G. Ionashiro, E. Y. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
UFG UFMT – Campus Cuiabá Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Costa, B. A. Nunes, W. D.G. [UNESP] Bembo, L. H. Siqueira, A. B. Caires, F. [UNESP] Leles, M. I.G. Ionashiro, E. Y. |
dc.subject.por.fl_str_mv |
Heavier lanthanides Lanthanides coordination compounds Terephthalate Thermal behavior |
topic |
Heavier lanthanides Lanthanides coordination compounds Terephthalate Thermal behavior |
description |
Coordination compounds of heavier lanthanides with terephthalate ligand have been synthesized and characterized employing simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), TG coupled to FTIR, elemental analysis and complexometry. The results from complexometry with EDTA and from TG curves allowed to establish the stoichiometry of these compounds, which are in agreement with the Ln2(TFTa)3·nH2O general formula where Ln represents trivalent lanthanides or yttrium, TFTA is terephthalate and n = 4 (Er, and Y); 4.5 (Tb, Dy, Ho and Tm); 5 (Yb) and 6.5 (Lu). The thermal decomposition of the anhydrous compounds occurs in two or three consecutive and/or overlapping steps, with the formation of the respective oxides: Tb4O7 and Ln2O3 (Ln = Dy to Lu and Y). The TG-FTIR of the evolved gases obtained from the thermal decomposition of the synthesized compounds, identified the formation of CO2 and water as main gaseous products. The FTIR results also led to information about the type of coordination of the isolated compounds which suggest that the lanthanides are linked to the carboxylate groups by a bridging bond. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T16:53:49Z 2018-12-11T16:53:49Z 2018-06-04 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s10973-018-7373-x Journal of Thermal Analysis and Calorimetry, p. 1-6. 1588-2926 1388-6150 http://hdl.handle.net/11449/171082 10.1007/s10973-018-7373-x 2-s2.0-85048005487 2-s2.0-85048005487.pdf |
url |
http://dx.doi.org/10.1007/s10973-018-7373-x http://hdl.handle.net/11449/171082 |
identifier_str_mv |
Journal of Thermal Analysis and Calorimetry, p. 1-6. 1588-2926 1388-6150 10.1007/s10973-018-7373-x 2-s2.0-85048005487 2-s2.0-85048005487.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Thermal Analysis and Calorimetry 0,587 0,587 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-6 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128821894840320 |