On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyan...

Autores: Ruiz, Gustavo Teodosio; Juliarena, María Paula; Ferraudi, G. J.; Lappin, A. G.; Bogges,W.; Feliz, Mario R.
Año de publicación: 2012
Idioma: inglés
Tipo de recurso: artículo
Estado: versión publicada
Descripción: We have explored in this work the photo- and thermally-induced degradations of water soluble lignin in aqueous homogeneous media. Coordination complexes, Al(III) phthalocyaninetetrasulfonate ([Al III(tspc)] 3- and tspc 6- = phthalocyaninetetrasulfonate) and Co III/II dimethylglyoximate (dimethylglyoximate = DMG -) were used as catalysts of degrading processes with different mechanisms. The photodegradation was induced with visible light, λ exc ≥ 470 nm, and [Al III(tspc)] 3- as the photosensitizer of the ( 3Σ g -)O 2 to ( 1Δ g)O 2 conversion. ( 1Δ g)O 2 was the primary active species of the degrading process. [Co(DMG) 2(SO 3) 2] 3- and [Co(DMG) 2Cl 2] - in the presence and absence of SO 3 2- were used as catalysts of the thermal lignin degrading process. Differences in the mechanisms of the photo and thermally induced processes lead to some diversity of products. Adducts formed in solutions containing [Al III(tspc)] 3- and lignin have the absorption spectrum of phthalocyanine oligomers and could be located in pockets of the lignin. Under a steady state irradiation, the attack of lignin by ( 1Δ g)O 2 was followed by changes in the spectrum of the solution and by the formation of various products. The participation of O 2 ·- radicals in the mechanism photodegrading process was investigated with the pulse radiolysis technique. Different lignin radicals were produced when pulse radiolytically generated O 2 ·- and N 3 · radicals reacted with lignin. The Co III/II dimethylglyoximate catalyzed lignin degrading process was investigated in the presence and absence of SO 3 2-. Although the presence SO 3 2- in the medium is not essential, it accelerates the degrading process. This observation shows the participation of inorganic S(V) radicals, e.g., SO 3 ·-, as active species in the mechanism when SO 3 2- is present. Moreover, the pulse radiolysis experiments demonstrate that O 2 ·- can be an active species when SO 3 2- is absent.
Fil: Ruiz, Gustavo Teodosio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Juliarena, María Paula. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina
Fil: Ferraudi, G. J.. University of Notre Dame; Estados Unidos
Fil: Lappin, A. G.. University of Notre Dame; Estados Unidos
Fil: Bogges,W.. University of Notre Dame; Estados Unidos
Fil: Feliz, Mario R.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Materia: Al(Iii) Phthalocyaninetetrasulfonate
Catalysis
Co Iii/Ii Dimethylglyoximate
Flash Photolysis
Lignin
Pulse Radiolysis
Nivel de accesibilidad: acceso abierto
Condiciones de uso: https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
Institución: Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador: oai:ri.conicet.gov.ar:11336/81884

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network_acronym_str	CONICETDig
repository_id_str	3498
network_name_str	CONICET Digital (CONICET)
spelling	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexesRuiz, Gustavo TeodosioJuliarena, María PaulaFerraudi, G. J.Lappin, A. G.Bogges,W.Feliz, Mario R.Al(Iii) PhthalocyaninetetrasulfonateCatalysisCo Iii/Ii DimethylglyoximateFlash PhotolysisLigninPulse Radiolysishttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1We have explored in this work the photo- and thermally-induced degradations of water soluble lignin in aqueous homogeneous media. Coordination complexes, Al(III) phthalocyaninetetrasulfonate ([Al III(tspc)] 3- and tspc 6- = phthalocyaninetetrasulfonate) and Co III/II dimethylglyoximate (dimethylglyoximate = DMG -) were used as catalysts of degrading processes with different mechanisms. The photodegradation was induced with visible light, λ exc ≥ 470 nm, and [Al III(tspc)] 3- as the photosensitizer of the ( 3Σ g -)O 2 to ( 1Δ g)O 2 conversion. ( 1Δ g)O 2 was the primary active species of the degrading process. [Co(DMG) 2(SO 3) 2] 3- and [Co(DMG) 2Cl 2] - in the presence and absence of SO 3 2- were used as catalysts of the thermal lignin degrading process. Differences in the mechanisms of the photo and thermally induced processes lead to some diversity of products. Adducts formed in solutions containing [Al III(tspc)] 3- and lignin have the absorption spectrum of phthalocyanine oligomers and could be located in pockets of the lignin. Under a steady state irradiation, the attack of lignin by ( 1Δ g)O 2 was followed by changes in the spectrum of the solution and by the formation of various products. The participation of O 2 ·- radicals in the mechanism photodegrading process was investigated with the pulse radiolysis technique. Different lignin radicals were produced when pulse radiolytically generated O 2 ·- and N 3 · radicals reacted with lignin. The Co III/II dimethylglyoximate catalyzed lignin degrading process was investigated in the presence and absence of SO 3 2-. Although the presence SO 3 2- in the medium is not essential, it accelerates the degrading process. This observation shows the participation of inorganic S(V) radicals, e.g., SO 3 ·-, as active species in the mechanism when SO 3 2- is present. Moreover, the pulse radiolysis experiments demonstrate that O 2 ·- can be an active species when SO 3 2- is absent.Fil: Ruiz, Gustavo Teodosio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Juliarena, María Paula. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; ArgentinaFil: Ferraudi, G. J.. University of Notre Dame; Estados UnidosFil: Lappin, A. G.. University of Notre Dame; Estados UnidosFil: Bogges,W.. University of Notre Dame; Estados UnidosFil: Feliz, Mario R.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaPergamon-Elsevier Science Ltd2012-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/81884Ruiz, Gustavo Teodosio; Juliarena, María Paula; Ferraudi, G. J.; Lappin, A. G.; Bogges,W.; et al.; On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes; Pergamon-Elsevier Science Ltd; Polyhedron; 38; 1; 5-2012; 36-430277-5387CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277538712000708info:eu-repo/semantics/altIdentifier/doi/10.1016/j.poly.2012.02.004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:26:39Zoai:ri.conicet.gov.ar:11336/81884instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:26:39.631CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes
title	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes
spellingShingle	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes Ruiz, Gustavo Teodosio Al(Iii) Phthalocyaninetetrasulfonate Catalysis Co Iii/Ii Dimethylglyoximate Flash Photolysis Lignin Pulse Radiolysis
title_short	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes
title_full	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes
title_fullStr	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes
title_full_unstemmed	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes
title_sort	On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes
dc.creator.none.fl_str_mv	Ruiz, Gustavo Teodosio Juliarena, María Paula Ferraudi, G. J. Lappin, A. G. Bogges,W. Feliz, Mario R.
author	Ruiz, Gustavo Teodosio
author_facet	Ruiz, Gustavo Teodosio Juliarena, María Paula Ferraudi, G. J. Lappin, A. G. Bogges,W. Feliz, Mario R.
author_role	author
author2	Juliarena, María Paula Ferraudi, G. J. Lappin, A. G. Bogges,W. Feliz, Mario R.
author2_role	author author author author author
dc.subject.none.fl_str_mv	Al(Iii) Phthalocyaninetetrasulfonate Catalysis Co Iii/Ii Dimethylglyoximate Flash Photolysis Lignin Pulse Radiolysis
topic	Al(Iii) Phthalocyaninetetrasulfonate Catalysis Co Iii/Ii Dimethylglyoximate Flash Photolysis Lignin Pulse Radiolysis
purl_subject.fl_str_mv	https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv	We have explored in this work the photo- and thermally-induced degradations of water soluble lignin in aqueous homogeneous media. Coordination complexes, Al(III) phthalocyaninetetrasulfonate ([Al III(tspc)] 3- and tspc 6- = phthalocyaninetetrasulfonate) and Co III/II dimethylglyoximate (dimethylglyoximate = DMG -) were used as catalysts of degrading processes with different mechanisms. The photodegradation was induced with visible light, λ exc ≥ 470 nm, and [Al III(tspc)] 3- as the photosensitizer of the ( 3Σ g -)O 2 to ( 1Δ g)O 2 conversion. ( 1Δ g)O 2 was the primary active species of the degrading process. [Co(DMG) 2(SO 3) 2] 3- and [Co(DMG) 2Cl 2] - in the presence and absence of SO 3 2- were used as catalysts of the thermal lignin degrading process. Differences in the mechanisms of the photo and thermally induced processes lead to some diversity of products. Adducts formed in solutions containing [Al III(tspc)] 3- and lignin have the absorption spectrum of phthalocyanine oligomers and could be located in pockets of the lignin. Under a steady state irradiation, the attack of lignin by ( 1Δ g)O 2 was followed by changes in the spectrum of the solution and by the formation of various products. The participation of O 2 ·- radicals in the mechanism photodegrading process was investigated with the pulse radiolysis technique. Different lignin radicals were produced when pulse radiolytically generated O 2 ·- and N 3 · radicals reacted with lignin. The Co III/II dimethylglyoximate catalyzed lignin degrading process was investigated in the presence and absence of SO 3 2-. Although the presence SO 3 2- in the medium is not essential, it accelerates the degrading process. This observation shows the participation of inorganic S(V) radicals, e.g., SO 3 ·-, as active species in the mechanism when SO 3 2- is present. Moreover, the pulse radiolysis experiments demonstrate that O 2 ·- can be an active species when SO 3 2- is absent. Fil: Ruiz, Gustavo Teodosio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina Fil: Juliarena, María Paula. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina Fil: Ferraudi, G. J.. University of Notre Dame; Estados Unidos Fil: Lappin, A. G.. University of Notre Dame; Estados Unidos Fil: Bogges,W.. University of Notre Dame; Estados Unidos Fil: Feliz, Mario R.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
description	We have explored in this work the photo- and thermally-induced degradations of water soluble lignin in aqueous homogeneous media. Coordination complexes, Al(III) phthalocyaninetetrasulfonate ([Al III(tspc)] 3- and tspc 6- = phthalocyaninetetrasulfonate) and Co III/II dimethylglyoximate (dimethylglyoximate = DMG -) were used as catalysts of degrading processes with different mechanisms. The photodegradation was induced with visible light, λ exc ≥ 470 nm, and [Al III(tspc)] 3- as the photosensitizer of the ( 3Σ g -)O 2 to ( 1Δ g)O 2 conversion. ( 1Δ g)O 2 was the primary active species of the degrading process. [Co(DMG) 2(SO 3) 2] 3- and [Co(DMG) 2Cl 2] - in the presence and absence of SO 3 2- were used as catalysts of the thermal lignin degrading process. Differences in the mechanisms of the photo and thermally induced processes lead to some diversity of products. Adducts formed in solutions containing [Al III(tspc)] 3- and lignin have the absorption spectrum of phthalocyanine oligomers and could be located in pockets of the lignin. Under a steady state irradiation, the attack of lignin by ( 1Δ g)O 2 was followed by changes in the spectrum of the solution and by the formation of various products. The participation of O 2 ·- radicals in the mechanism photodegrading process was investigated with the pulse radiolysis technique. Different lignin radicals were produced when pulse radiolytically generated O 2 ·- and N 3 · radicals reacted with lignin. The Co III/II dimethylglyoximate catalyzed lignin degrading process was investigated in the presence and absence of SO 3 2-. Although the presence SO 3 2- in the medium is not essential, it accelerates the degrading process. This observation shows the participation of inorganic S(V) radicals, e.g., SO 3 ·-, as active species in the mechanism when SO 3 2- is present. Moreover, the pulse radiolysis experiments demonstrate that O 2 ·- can be an active species when SO 3 2- is absent.
publishDate	2012
dc.date.none.fl_str_mv	2012-05
dc.type.none.fl_str_mv	info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/11336/81884 Ruiz, Gustavo Teodosio; Juliarena, María Paula; Ferraudi, G. J.; Lappin, A. G.; Bogges,W.; et al.; On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes; Pergamon-Elsevier Science Ltd; Polyhedron; 38; 1; 5-2012; 36-43 0277-5387 CONICET Digital CONICET
url	http://hdl.handle.net/11336/81884
identifier_str_mv	Ruiz, Gustavo Teodosio; Juliarena, María Paula; Ferraudi, G. J.; Lappin, A. G.; Bogges,W.; et al.; On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyaninetetrasulfonate) 3- and Co III dimethylglyoximate complexes; Pergamon-Elsevier Science Ltd; Polyhedron; 38; 1; 5-2012; 36-43 0277-5387 CONICET Digital CONICET
dc.language.none.fl_str_mv	eng
language	eng
dc.relation.none.fl_str_mv	info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277538712000708 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.poly.2012.02.004
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv	openAccess
rights_invalid_str_mv	https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv	application/pdf application/pdf application/pdf application/pdf
dc.publisher.none.fl_str_mv	Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv	Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv	reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str	CONICET Digital (CONICET)
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instname_str	Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv	dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score	13.22299

On the homogeneous catalysis of the photochemical and thermal O 2-degrading of lignin in aqueous solution. Mechanistic observations on the processes catalyzed by Al III(phthalocyan...

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