Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy)
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.tca.2017.03.002 http://hdl.handle.net/11449/178722 |
Resumo: | Lanthanide Mefenamate compounds were prepared in solid state. TG-DSC coupled to FTIR, elemental analysis, complexometry with EDTA, X-ray powder diffractometry, evaluation of scavenging free radical activity with DPPH (2,2-diphenyl-1-picryl-hydrazine), and a complete spectroscopic study in the ultraviolet, visible, near-, and middle-infrared regions were realized to obtain some physicochemical properties of the synthesized compounds. The thermal stability, minimum formula, thermal behavior and intermediate compounds were indicated by thermoanalytical results. Furthermore, vibrational spectroscopy data suggests that the complexes are binuclear and two modes of coordination are presented. The DR spectra could be reveal the presence of a large ligand-to-metal charge transfer band in the europium mefenamate. This compound also indicated the higher antioxidant activity with DPPH (77.03% at 200 μg L−1). |
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Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy)DPPHEGALanthanidesMefenamateSpectroscopyThermal analysisLanthanide Mefenamate compounds were prepared in solid state. TG-DSC coupled to FTIR, elemental analysis, complexometry with EDTA, X-ray powder diffractometry, evaluation of scavenging free radical activity with DPPH (2,2-diphenyl-1-picryl-hydrazine), and a complete spectroscopic study in the ultraviolet, visible, near-, and middle-infrared regions were realized to obtain some physicochemical properties of the synthesized compounds. The thermal stability, minimum formula, thermal behavior and intermediate compounds were indicated by thermoanalytical results. Furthermore, vibrational spectroscopy data suggests that the complexes are binuclear and two modes of coordination are presented. The DR spectra could be reveal the presence of a large ligand-to-metal charge transfer band in the europium mefenamate. This compound also indicated the higher antioxidant activity with DPPH (77.03% at 200 μg L−1).Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Instituto de Química UNESP – Campus AraraquaraInstituto Federal de Educação Ciência e Tecnologia de Mato Grosso IFMT – Campus Primavera do Leste CEP do LesteInstituto de Química UNICAMP – Universidade Estadual de CampinasUniversidade Federal de Mato Grosso UFMT – Campus CuiabáFaculdade de Ciências UNESP – Campus BauruInstituto de Química UNESP – Campus AraraquaraFaculdade de Ciências UNESP – Campus BauruUniversidade Estadual Paulista (Unesp)CEP do LesteUniversidade Estadual de Campinas (UNICAMP)UFMT – Campus CuiabáCampos, Francisco X. [UNESP]Nascimento, André L.C.S. [UNESP]Colman, Tiago A.D. [UNESP]Gálico, Diogo A.Carvalho, Ana C.S.Caires, Flávio J. [UNESP]Siqueira, Adriano B.Ionashiro, Massao [UNESP]2018-12-11T17:31:49Z2018-12-11T17:31:49Z2017-05-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article73-82application/pdfhttp://dx.doi.org/10.1016/j.tca.2017.03.002Thermochimica Acta, v. 651, p. 73-82.0040-6031http://hdl.handle.net/11449/17872210.1016/j.tca.2017.03.0022-s2.0-850156773702-s2.0-85015677370.pdf8460531302083773Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengThermochimica Acta0,605info:eu-repo/semantics/openAccess2024-01-13T06:38:21Zoai:repositorio.unesp.br:11449/178722Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-13T06:38:21Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) |
title |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) |
spellingShingle |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) Campos, Francisco X. [UNESP] DPPH EGA Lanthanides Mefenamate Spectroscopy Thermal analysis |
title_short |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) |
title_full |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) |
title_fullStr |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) |
title_full_unstemmed |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) |
title_sort |
Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy) |
author |
Campos, Francisco X. [UNESP] |
author_facet |
Campos, Francisco X. [UNESP] Nascimento, André L.C.S. [UNESP] Colman, Tiago A.D. [UNESP] Gálico, Diogo A. Carvalho, Ana C.S. Caires, Flávio J. [UNESP] Siqueira, Adriano B. Ionashiro, Massao [UNESP] |
author_role |
author |
author2 |
Nascimento, André L.C.S. [UNESP] Colman, Tiago A.D. [UNESP] Gálico, Diogo A. Carvalho, Ana C.S. Caires, Flávio J. [UNESP] Siqueira, Adriano B. Ionashiro, Massao [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) CEP do Leste Universidade Estadual de Campinas (UNICAMP) UFMT – Campus Cuiabá |
dc.contributor.author.fl_str_mv |
Campos, Francisco X. [UNESP] Nascimento, André L.C.S. [UNESP] Colman, Tiago A.D. [UNESP] Gálico, Diogo A. Carvalho, Ana C.S. Caires, Flávio J. [UNESP] Siqueira, Adriano B. Ionashiro, Massao [UNESP] |
dc.subject.por.fl_str_mv |
DPPH EGA Lanthanides Mefenamate Spectroscopy Thermal analysis |
topic |
DPPH EGA Lanthanides Mefenamate Spectroscopy Thermal analysis |
description |
Lanthanide Mefenamate compounds were prepared in solid state. TG-DSC coupled to FTIR, elemental analysis, complexometry with EDTA, X-ray powder diffractometry, evaluation of scavenging free radical activity with DPPH (2,2-diphenyl-1-picryl-hydrazine), and a complete spectroscopic study in the ultraviolet, visible, near-, and middle-infrared regions were realized to obtain some physicochemical properties of the synthesized compounds. The thermal stability, minimum formula, thermal behavior and intermediate compounds were indicated by thermoanalytical results. Furthermore, vibrational spectroscopy data suggests that the complexes are binuclear and two modes of coordination are presented. The DR spectra could be reveal the presence of a large ligand-to-metal charge transfer band in the europium mefenamate. This compound also indicated the higher antioxidant activity with DPPH (77.03% at 200 μg L−1). |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-05-10 2018-12-11T17:31:49Z 2018-12-11T17:31:49Z |
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/10.1016/j.tca.2017.03.002 Thermochimica Acta, v. 651, p. 73-82. 0040-6031 http://hdl.handle.net/11449/178722 10.1016/j.tca.2017.03.002 2-s2.0-85015677370 2-s2.0-85015677370.pdf 8460531302083773 |
url |
http://dx.doi.org/10.1016/j.tca.2017.03.002 http://hdl.handle.net/11449/178722 |
identifier_str_mv |
Thermochimica Acta, v. 651, p. 73-82. 0040-6031 10.1016/j.tca.2017.03.002 2-s2.0-85015677370 2-s2.0-85015677370.pdf 8460531302083773 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Thermochimica Acta 0,605 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
73-82 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_ |
1803046870972366848 |