Synthesis and evaluation of the thermal behavior of flavonoids: Thermal decomposition of flavanone and 6-hydroxyflavanone
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/10.1007/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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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 |
|
_version_ |
1808128541120790528 |