Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)

Detalhes bibliográficos
Autor(a) principal: Quirrenbach, Hanna Raquel
Data de Publicação: 2007
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UEPG
Texto Completo: http://tede2.uepg.br/jspui/handle/prefix/696
Resumo: The phytic acid depending on the pH value presents high potential quelante, quelanting metallic ions, inhibiting the production of species reactivates of oxygen, responsible for the destruction oxidative in biological systems. That potential quelante has been basing several applied studies to the antioxidant action in foods products, in environmental controls and as antioxidant in the human organism. The objective of this work was to study the degree of interaction of the phytic acid with the metallic ions Fe(II) and Fe(III), of biological importance, in near conditions of the physiologic and the stability of these complexes. Potentiometric titration were driven to determine the constants of formation of the complexes phytic acid-Fe(II) and phytic acid-Fe(III) in solution, under conditions of inert atmosphere, it ionic strength 0,1 mol.L-1 (KCl) at 36±0,1 ºC. For the system phytic acid- Fe(II), were determined seven constant of formation, corresponding to seven species formed in the range p[H] from 2,0 to 12,0. The first constant of formation of the complex phytic acid- Fe(II), it presented log K = 16,06 for the specie [MHL]9-, indicating that a great affinity exists among the ligand monoprotonated with the metal. For the system phytic acid-Fe(III) were determined seven constant of formation, seven species were detected in the range p[H] from 2,5 to 12,0. The first constant of formation of the complex presented log K = 18,87, very high value for the species [ML]9-, this denoted a strong interaction among the ligand deprotonated and the metallic ion. Studies spectroscopy in the region of the UV-Vis, were performed to accompany the formation of the complexes of the phytic acid with the metallic ions Fe(II) and Fe(III). In the studies of UV-Vis of the phytic acid in absence of the metallic ions, not occurred any absorption in the area of wavelength from 200 to 800 nm. Already for the ligand in the presence of the metallic ions two absorption bands were detected in 216 and 279 nm for the phytic acid-Fe(II) and 218 and 274 nm for the phytic acid Fe(III). Those are bands of transfer of electrons of the ligand for the metallic ion with formation of the linking coordinative. The complexes phytic acid-Fe(II) and phytic acid-Fe(III) were synthesized from the data potentiometric and characterized by absorption spectroscopy in the area of the infrared. The spectra for the system phytic acid in presence of the ions Fe(II), synthesized in pH=7,4, and Fe(III), pH=7,1, showed displacements in the areas of frequency of the groups O=PO3H2 of the phytic acid free. Those displacements, evidence that the ligant is coordinated to the metallic ions. Through the termogravimetry it verified that in the interval from 30 to 780 ºC the loss of total mass of the complex phytic acid-Fe(II) it was of 24,43 %. Of the room temperature up to 185 ºC, occurred the liberation of molecules of hydration water. In superior temperatures of this value the mass losses were relative to the decomposition of the compound, with liberation of constitution water and decomposition of the organic matter, with formation of double pyrophosphate of potassium and Fe(II) and potassium metaphosphate. The phytic acid-Fe(III) complexes presented thermal behavior similar to the complex phytic acid-Fe(II), however for the complex phytic acid-Fe(III) synthesized in pH 7,1 the loss of total mass of it was of 25,64 % in the area from 30 to 800 ºC, while the compound synthesized in pH 9,9 presented a loss of total mass of 31,98 % in the interval of temperature from 30 to 845 ºC. The obtained data, for the three complexes, indicate that the ligand is coordinated with the metallic ions so much in values of low pH as to you value of higher pH.
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spelling Rosso, Neiva DeliberaliCPF:32532245034http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4790535Y3Carvalho Filho, Marco Aurélio da SilvaCPF:13054525856http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4799780P9Schnitzler, EgonCPF:28698304915http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4703720H3CPF:03371919994http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4708077E6Quirrenbach, Hanna Raquel2017-07-21T18:53:17Z2015-07-012017-07-21T18:53:17Z2007-02-15QUIRRENBACH, Hanna Raquel. Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III). 2007. 82 f. Dissertação (Mestrado em Ciências e Tecnologia de Alimentos) - UNIVERSIDADE ESTADUAL DE PONTA GROSSA, Ponta Grossa, 2007.http://tede2.uepg.br/jspui/handle/prefix/696The phytic acid depending on the pH value presents high potential quelante, quelanting metallic ions, inhibiting the production of species reactivates of oxygen, responsible for the destruction oxidative in biological systems. That potential quelante has been basing several applied studies to the antioxidant action in foods products, in environmental controls and as antioxidant in the human organism. The objective of this work was to study the degree of interaction of the phytic acid with the metallic ions Fe(II) and Fe(III), of biological importance, in near conditions of the physiologic and the stability of these complexes. Potentiometric titration were driven to determine the constants of formation of the complexes phytic acid-Fe(II) and phytic acid-Fe(III) in solution, under conditions of inert atmosphere, it ionic strength 0,1 mol.L-1 (KCl) at 36±0,1 ºC. For the system phytic acid- Fe(II), were determined seven constant of formation, corresponding to seven species formed in the range p[H] from 2,0 to 12,0. The first constant of formation of the complex phytic acid- Fe(II), it presented log K = 16,06 for the specie [MHL]9-, indicating that a great affinity exists among the ligand monoprotonated with the metal. For the system phytic acid-Fe(III) were determined seven constant of formation, seven species were detected in the range p[H] from 2,5 to 12,0. The first constant of formation of the complex presented log K = 18,87, very high value for the species [ML]9-, this denoted a strong interaction among the ligand deprotonated and the metallic ion. Studies spectroscopy in the region of the UV-Vis, were performed to accompany the formation of the complexes of the phytic acid with the metallic ions Fe(II) and Fe(III). In the studies of UV-Vis of the phytic acid in absence of the metallic ions, not occurred any absorption in the area of wavelength from 200 to 800 nm. Already for the ligand in the presence of the metallic ions two absorption bands were detected in 216 and 279 nm for the phytic acid-Fe(II) and 218 and 274 nm for the phytic acid Fe(III). Those are bands of transfer of electrons of the ligand for the metallic ion with formation of the linking coordinative. The complexes phytic acid-Fe(II) and phytic acid-Fe(III) were synthesized from the data potentiometric and characterized by absorption spectroscopy in the area of the infrared. The spectra for the system phytic acid in presence of the ions Fe(II), synthesized in pH=7,4, and Fe(III), pH=7,1, showed displacements in the areas of frequency of the groups O=PO3H2 of the phytic acid free. Those displacements, evidence that the ligant is coordinated to the metallic ions. Through the termogravimetry it verified that in the interval from 30 to 780 ºC the loss of total mass of the complex phytic acid-Fe(II) it was of 24,43 %. Of the room temperature up to 185 ºC, occurred the liberation of molecules of hydration water. In superior temperatures of this value the mass losses were relative to the decomposition of the compound, with liberation of constitution water and decomposition of the organic matter, with formation of double pyrophosphate of potassium and Fe(II) and potassium metaphosphate. The phytic acid-Fe(III) complexes presented thermal behavior similar to the complex phytic acid-Fe(II), however for the complex phytic acid-Fe(III) synthesized in pH 7,1 the loss of total mass of it was of 25,64 % in the area from 30 to 800 ºC, while the compound synthesized in pH 9,9 presented a loss of total mass of 31,98 % in the interval of temperature from 30 to 845 ºC. The obtained data, for the three complexes, indicate that the ligand is coordinated with the metallic ions so much in values of low pH as to you value of higher pH.O ácido fítico dependendo do valor de pH apresenta alto potencial quelante, complexando íons metálicos, inibindo assim a produção de espécies reativas de oxigênio, responsáveis pela destruição oxidativa em sistemas biológicos. Esse potencial quelante tem fundamentado diversos estudos aplicados à ação antioxidante em produtos alimentícios, em controles ambientais e como antioxidante no organismo humano. O objetivo deste trabalho foi estudar o grau de interação do ácido fítico com os íons metálicos Fe(II) e Fe(III), de importância biológica, em condições próximas às fisiológicas e a estabilidade destes complexos. Titulações potenciométricas foram conduzidas para determinar as constantes de formação dos complexos ácido fítico-Fe(II) e ácido fítico-Fe(III) em solução, sob condições de atmosfera inerte, força iônica 0,100 mol.L-1 (KCl) a 36±0,1 ºC. Para o sistema ácido fítico- Fe(II), determinaram sete constantes de formação, correspondente a sete espécies formadas na faixa de p[H] de 2,0 a 12,0. A primeira constante de formação do complexo ácido fítico- Fe(II), apresentou log K=16,06 para a espécie [MHL]9-, indicando que existe uma grande afinidade entre o ligante monoprotonado com o metal. Para o sistema ácido fítico-Fe(III) foram determinadas sete constantes de formação, sete espécies foram detectadas na faixa de p[H] de 2,5 a 12,0. A primeira constante de formação do complexo apresentou log K=18,87, valor muito elevado para a espécie [ML]9-, isto denotou uma forte interação entre o ligante totalmente deprotonado e o íon Fe(III). Estudos espectroscópicos na região do UV-Vis foram realizados para acompanhar a formação dos complexos do ligante com os íons metálicos Fe(II) e Fe(III). Nos estudos de UV-Vis do ácido fítico em ausência dos íons metálicos não ocorreu nenhuma absorção na faixa de comprimento de onda de 200 a 800 nm. Já para o ligante na presença dos íons metálicos foram detectadas duas bandas de absorção em 216 e 279 nm para o ácido fítico-Fe(II) e 218 e 274 nm para o ácido fítico Fe(III). Essas são bandas de transferência de elétrons do ligante para o íon metálico com formação da ligação coordenativa. Os complexos ácido fítico-Fe(II) e ácido fítico-Fe(III) foram sintetizados a partir dos dados potenciométricos e caracterizados por espectroscopia de absorção na região do infravermelho. Os espectros para o sistema ácido fítico em presença do íon Fe(II), sintetizado em pH=7,4, e Fe(III), pH=7,1, mostraram deslocamentos nas regiões de freqüência dos grupamentos O=PO3H2 do ácido fítico livre. Esses deslocamentos evidenciam que o ligante encontra-se coordenado aos íons metálicos. Através da termogravimetria constatou-se que no intervalo de 30 a 780 ºC, a perda de massa total do complexo ácido fítico-Fe(II) foi de 24,43 %. Da temperatura ambiente até 185 ºC, ocorreu a liberação de moléculas de água de hidratação. Em temperaturas superiores deste valor as perdas de massa foram relativas à decomposição do complexo, com liberação de água de constituição e decomposição da matéria orgânica, com formação de pirofosfato duplo de potássio e Fe(II) e metafosfato de potássio. Os complexos ácido fítico-Fe(III) apresentaram comportamento térmico semelhante ao complexo ácido fítico-Fe(II), porém, para o complexo ácido fítico-Fe(III) sintetizado em pH 7,1 a perda de massa total do foi de 25,64 % na faixa de 30 a 800 ºC, enquanto que o complexo sintetizado em pH 9,9 apresentou uma perda de massa total de 31,98 % no intervalo de temperatura de 30 a 845 ºC. Os dados obtidos, para os três complexos, indicam que o ligante encontra-se coordenado com os íons metálicos tanto em valores de pH baixo como em valores de pH mais elevados.Made available in DSpace on 2017-07-21T18:53:17Z (GMT). No. of bitstreams: 1 hanna.pdf: 1540428 bytes, checksum: 5ef484decfdf0f2847bc9b139292d514 (MD5) Previous issue date: 2007-02-15application/pdfporUNIVERSIDADE ESTADUAL DE PONTA GROSSAPrograma de Pós-Graduação em Ciência e Tecnologia de AlimentosUEPGBRCiências e Tecnologia de Alimentosácido fíticoFe(II)Fe(III)complexos e estabilidadephytic acidFe(II)Fe(III)complexes and stabilityCNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOSDeterminação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UEPGinstname:Universidade Estadual de Ponta Grossa (UEPG)instacron:UEPGORIGINALhanna.pdfapplication/pdf1540428http://tede2.uepg.br/jspui/bitstream/prefix/696/1/hanna.pdf5ef484decfdf0f2847bc9b139292d514MD51prefix/6962017-07-21 15:53:17.856oai:tede2.uepg.br:prefix/696Biblioteca Digital de Teses e Dissertaçõeshttps://tede2.uepg.br/jspui/PUBhttp://tede2.uepg.br/oai/requestbicen@uepg.br||mv_fidelis@yahoo.com.bropendoar:2017-07-21T18:53:17Biblioteca Digital de Teses e Dissertações da UEPG - Universidade Estadual de Ponta Grossa (UEPG)false
dc.title.por.fl_str_mv Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
title Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
spellingShingle Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
Quirrenbach, Hanna Raquel
ácido fítico
Fe(II)
Fe(III)
complexos e estabilidade
phytic acid
Fe(II)
Fe(III)
complexes and stability
CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS
title_short Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
title_full Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
title_fullStr Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
title_full_unstemmed Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
title_sort Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III)
author Quirrenbach, Hanna Raquel
author_facet Quirrenbach, Hanna Raquel
author_role author
dc.contributor.advisor1.fl_str_mv Rosso, Neiva Deliberali
dc.contributor.advisor1ID.fl_str_mv CPF:32532245034
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4790535Y3
dc.contributor.referee1.fl_str_mv Carvalho Filho, Marco Aurélio da Silva
dc.contributor.referee1ID.fl_str_mv CPF:13054525856
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4799780P9
dc.contributor.referee2.fl_str_mv Schnitzler, Egon
dc.contributor.referee2ID.fl_str_mv CPF:28698304915
dc.contributor.referee2Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4703720H3
dc.contributor.authorID.fl_str_mv CPF:03371919994
dc.contributor.authorLattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4708077E6
dc.contributor.author.fl_str_mv Quirrenbach, Hanna Raquel
contributor_str_mv Rosso, Neiva Deliberali
Carvalho Filho, Marco Aurélio da Silva
Schnitzler, Egon
dc.subject.por.fl_str_mv ácido fítico
Fe(II)
Fe(III)
complexos e estabilidade
topic ácido fítico
Fe(II)
Fe(III)
complexos e estabilidade
phytic acid
Fe(II)
Fe(III)
complexes and stability
CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS
dc.subject.eng.fl_str_mv phytic acid
Fe(II)
Fe(III)
complexes and stability
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS
description The phytic acid depending on the pH value presents high potential quelante, quelanting metallic ions, inhibiting the production of species reactivates of oxygen, responsible for the destruction oxidative in biological systems. That potential quelante has been basing several applied studies to the antioxidant action in foods products, in environmental controls and as antioxidant in the human organism. The objective of this work was to study the degree of interaction of the phytic acid with the metallic ions Fe(II) and Fe(III), of biological importance, in near conditions of the physiologic and the stability of these complexes. Potentiometric titration were driven to determine the constants of formation of the complexes phytic acid-Fe(II) and phytic acid-Fe(III) in solution, under conditions of inert atmosphere, it ionic strength 0,1 mol.L-1 (KCl) at 36±0,1 ºC. For the system phytic acid- Fe(II), were determined seven constant of formation, corresponding to seven species formed in the range p[H] from 2,0 to 12,0. The first constant of formation of the complex phytic acid- Fe(II), it presented log K = 16,06 for the specie [MHL]9-, indicating that a great affinity exists among the ligand monoprotonated with the metal. For the system phytic acid-Fe(III) were determined seven constant of formation, seven species were detected in the range p[H] from 2,5 to 12,0. The first constant of formation of the complex presented log K = 18,87, very high value for the species [ML]9-, this denoted a strong interaction among the ligand deprotonated and the metallic ion. Studies spectroscopy in the region of the UV-Vis, were performed to accompany the formation of the complexes of the phytic acid with the metallic ions Fe(II) and Fe(III). In the studies of UV-Vis of the phytic acid in absence of the metallic ions, not occurred any absorption in the area of wavelength from 200 to 800 nm. Already for the ligand in the presence of the metallic ions two absorption bands were detected in 216 and 279 nm for the phytic acid-Fe(II) and 218 and 274 nm for the phytic acid Fe(III). Those are bands of transfer of electrons of the ligand for the metallic ion with formation of the linking coordinative. The complexes phytic acid-Fe(II) and phytic acid-Fe(III) were synthesized from the data potentiometric and characterized by absorption spectroscopy in the area of the infrared. The spectra for the system phytic acid in presence of the ions Fe(II), synthesized in pH=7,4, and Fe(III), pH=7,1, showed displacements in the areas of frequency of the groups O=PO3H2 of the phytic acid free. Those displacements, evidence that the ligant is coordinated to the metallic ions. Through the termogravimetry it verified that in the interval from 30 to 780 ºC the loss of total mass of the complex phytic acid-Fe(II) it was of 24,43 %. Of the room temperature up to 185 ºC, occurred the liberation of molecules of hydration water. In superior temperatures of this value the mass losses were relative to the decomposition of the compound, with liberation of constitution water and decomposition of the organic matter, with formation of double pyrophosphate of potassium and Fe(II) and potassium metaphosphate. The phytic acid-Fe(III) complexes presented thermal behavior similar to the complex phytic acid-Fe(II), however for the complex phytic acid-Fe(III) synthesized in pH 7,1 the loss of total mass of it was of 25,64 % in the area from 30 to 800 ºC, while the compound synthesized in pH 9,9 presented a loss of total mass of 31,98 % in the interval of temperature from 30 to 845 ºC. The obtained data, for the three complexes, indicate that the ligand is coordinated with the metallic ions so much in values of low pH as to you value of higher pH.
publishDate 2007
dc.date.issued.fl_str_mv 2007-02-15
dc.date.available.fl_str_mv 2015-07-01
2017-07-21T18:53:17Z
dc.date.accessioned.fl_str_mv 2017-07-21T18:53:17Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv QUIRRENBACH, Hanna Raquel. Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III). 2007. 82 f. Dissertação (Mestrado em Ciências e Tecnologia de Alimentos) - UNIVERSIDADE ESTADUAL DE PONTA GROSSA, Ponta Grossa, 2007.
dc.identifier.uri.fl_str_mv http://tede2.uepg.br/jspui/handle/prefix/696
identifier_str_mv QUIRRENBACH, Hanna Raquel. Determinação das constantes de estabilidade, síntese e caracterização dos complexos de ácido fítico com os íons Fe(II) e Fe(III). 2007. 82 f. Dissertação (Mestrado em Ciências e Tecnologia de Alimentos) - UNIVERSIDADE ESTADUAL DE PONTA GROSSA, Ponta Grossa, 2007.
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dc.publisher.none.fl_str_mv UNIVERSIDADE ESTADUAL DE PONTA GROSSA
dc.publisher.program.fl_str_mv Programa de Pós-Graduação em Ciência e Tecnologia de Alimentos
dc.publisher.initials.fl_str_mv UEPG
dc.publisher.country.fl_str_mv BR
dc.publisher.department.fl_str_mv Ciências e Tecnologia de Alimentos
publisher.none.fl_str_mv UNIVERSIDADE ESTADUAL DE PONTA GROSSA
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