Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone

Detalhes bibliográficos
Autor(a) principal: Ferreira, Leonardo Miziara Barboza [UNESP]
Data de Publicação: 2017
Outros Autores: Kobelnik, Marcelo, Regasini, Luis Octavio [UNESP], Dutra, Luiz Antonio [UNESP], da Silva Bolzani, Vanderlan [UNESP], Ribeiro, Clóvis Augusto [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s10973-016-5896-6
http://hdl.handle.net/11449/173637
Resumo: Flavonoids in the broad sense of the term are virtually universal plant pigments. Synthesis of flavanone and 6-hydroxyflavanone was carried out and identified by H and C NMR. Details concerning the thermal behavior were evaluated by thermogravimetry under oxygen and nitrogen purge gases. Additionally, the kinetic studies were evaluated from several heating rates (5, 10 and 20 °C min−1) and sample mass of 2 mg in open crucibles. The obtained data were evaluated with the isoconversional method, where the values of activation energy (Ea/kJ mol−1) were plotted in function of the conversion degree (α). The results of thermal behavior of the flavanone under a nitrogen purge gas showed that this compound has a homogeneous degradation process while the hydroxyl group in the aromatic ring of 6-hydroxyflavanone there are two mass losses.
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spelling Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanoneFlavanonesNMR spectraThermogravimetryFlavonoids in the broad sense of the term are virtually universal plant pigments. Synthesis of flavanone and 6-hydroxyflavanone was carried out and identified by H and C NMR. Details concerning the thermal behavior were evaluated by thermogravimetry under oxygen and nitrogen purge gases. Additionally, the kinetic studies were evaluated from several heating rates (5, 10 and 20 °C min−1) and sample mass of 2 mg in open crucibles. The obtained data were evaluated with the isoconversional method, where the values of activation energy (Ea/kJ mol−1) were plotted in function of the conversion degree (α). The results of thermal behavior of the flavanone under a nitrogen purge gas showed that this compound has a homogeneous degradation process while the hydroxyl group in the aromatic ring of 6-hydroxyflavanone there are two mass losses.Departamento de Química Analítica Instituto de Química UNESP—Universidade Estadual Paulista, C.P. 355Centro Universitário do Norte Paulista UNORPDepartamento de Química Orgânica Instituto de Química UNESP—Universidade Estadual Paulista, C.P. 355Departamento de Química Analítica Instituto de Química UNESP—Universidade Estadual Paulista, C.P. 355Departamento de Química Orgânica Instituto de Química UNESP—Universidade Estadual Paulista, C.P. 355Universidade Estadual Paulista (Unesp)UNORPFerreira, Leonardo Miziara Barboza [UNESP]Kobelnik, MarceloRegasini, Luis Octavio [UNESP]Dutra, Luiz Antonio [UNESP]da Silva Bolzani, Vanderlan [UNESP]Ribeiro, Clóvis Augusto [UNESP]2018-12-11T17:07:01Z2018-12-11T17:07:01Z2017-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1605-1610application/pdfhttp://dx.doi.org/10.1007/s10973-016-5896-6Journal of Thermal Analysis and Calorimetry, v. 127, n. 2, p. 1605-1610, 2017.1588-29261388-6150http://hdl.handle.net/11449/17363710.1007/s10973-016-5896-62-s2.0-849917048982-s2.0-84991704898.pdf84983108918100820000-0002-7984-5908Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Thermal Analysis and Calorimetry0,5870,587info:eu-repo/semantics/openAccess2023-10-22T06:08:21Zoai:repositorio.unesp.br:11449/173637Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:37:34.550583Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
title Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
spellingShingle Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
Ferreira, Leonardo Miziara Barboza [UNESP]
Flavanones
NMR spectra
Thermogravimetry
title_short Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
title_full Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
title_fullStr Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
title_full_unstemmed Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
title_sort Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
author Ferreira, Leonardo Miziara Barboza [UNESP]
author_facet Ferreira, Leonardo Miziara Barboza [UNESP]
Kobelnik, Marcelo
Regasini, Luis Octavio [UNESP]
Dutra, Luiz Antonio [UNESP]
da Silva Bolzani, Vanderlan [UNESP]
Ribeiro, Clóvis Augusto [UNESP]
author_role author
author2 Kobelnik, Marcelo
Regasini, Luis Octavio [UNESP]
Dutra, Luiz Antonio [UNESP]
da Silva Bolzani, Vanderlan [UNESP]
Ribeiro, Clóvis Augusto [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
UNORP
dc.contributor.author.fl_str_mv Ferreira, Leonardo Miziara Barboza [UNESP]
Kobelnik, Marcelo
Regasini, Luis Octavio [UNESP]
Dutra, Luiz Antonio [UNESP]
da Silva Bolzani, Vanderlan [UNESP]
Ribeiro, Clóvis Augusto [UNESP]
dc.subject.por.fl_str_mv Flavanones
NMR spectra
Thermogravimetry
topic Flavanones
NMR spectra
Thermogravimetry
description Flavonoids in the broad sense of the term are virtually universal plant pigments. Synthesis of flavanone and 6-hydroxyflavanone was carried out and identified by H and C NMR. Details concerning the thermal behavior were evaluated by thermogravimetry under oxygen and nitrogen purge gases. Additionally, the kinetic studies were evaluated from several heating rates (5, 10 and 20 °C min−1) and sample mass of 2 mg in open crucibles. The obtained data were evaluated with the isoconversional method, where the values of activation energy (Ea/kJ mol−1) were plotted in function of the conversion degree (α). The results of thermal behavior of the flavanone under a nitrogen purge gas showed that this compound has a homogeneous degradation process while the hydroxyl group in the aromatic ring of 6-hydroxyflavanone there are two mass losses.
publishDate 2017
dc.date.none.fl_str_mv 2017-02-01
2018-12-11T17:07:01Z
2018-12-11T17:07:01Z
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/s10973-016-5896-6
Journal of Thermal Analysis and Calorimetry, v. 127, n. 2, p. 1605-1610, 2017.
1588-2926
1388-6150
http://hdl.handle.net/11449/173637
10.1007/s10973-016-5896-6
2-s2.0-84991704898
2-s2.0-84991704898.pdf
8498310891810082
0000-0002-7984-5908
url http://dx.doi.org/10.1007/s10973-016-5896-6
http://hdl.handle.net/11449/173637
identifier_str_mv Journal of Thermal Analysis and Calorimetry, v. 127, n. 2, p. 1605-1610, 2017.
1588-2926
1388-6150
10.1007/s10973-016-5896-6
2-s2.0-84991704898
2-s2.0-84991704898.pdf
8498310891810082
0000-0002-7984-5908
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 1605-1610
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
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