Thermal behavior, spectroscopic studies and free radical scavenging potential of some mefenamate trivalent lanthanides (Sm, Eu, Gd, Tb and Dy)

Detalhes bibliográficos
Autor(a) principal: Campos, Francisco X. [UNESP]
Data de Publicação: 2017
Outros Autores: 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]
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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spelling 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_ 1799965609361932288

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