New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems

Detalhes bibliográficos
Autor(a) principal: Coelho, Yara L.
Data de Publicação: 2020
Outros Autores: Agudelo, Álvaro J. P., Ferreira, Guilherme M. D., Ferreira, Gabriel M. D., Castro, Alan S. B. de, Hudson, Eliara A., Pires, Ana Clarissa S., Silva, Luis H. M. da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/42560
Resumo: Aqueous two-phase systems (ATPSs) have proven to be efficient and environmentally safe methods for extracting chemical species. However, the driving forces behind the partition of solutes in these systems are still little understood. A complete thermodynamic partitioning of phenothiazine dyes was investigated in poly(ethylene oxide) (PEO) + salt + water ATPSs. Standard transfer parameters (Gibbs free energy change (ΔtrGº), enthalpy change (ΔtrHº) and entropy change (TΔtrSº)) were evaluated, and their dependence on the dye structure, electrolyte nature and tie line length (TLL). All phenothiazine dyes are concentrated predominantly in the polymer enriched phase, with ΔtrGº values ranging from -4.1 up to -13.4 kJ mol-1. Due to the dye-PEO attractive interactions that occur mainly via benzene condensed ring present in the structures of phenothiazine dyes, the partitioning of these dyes was enthalpically driven, with -11.4 ≥ ΔtrHº ≥ -52 kJ mol-1 and -4.93 ≥ TΔtrSº ≥ -38 kJ mol-1.
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spelling New insights into the partitioning of phenothiazine dyes in aqueous two-phase systemsAqueous two-phase systemThermodynamicPhenothiazine dyeDriving forceSistema aquoso de duas fasesTermodinâmicaCorante fenotiazinaForça motrizAqueous two-phase systems (ATPSs) have proven to be efficient and environmentally safe methods for extracting chemical species. However, the driving forces behind the partition of solutes in these systems are still little understood. A complete thermodynamic partitioning of phenothiazine dyes was investigated in poly(ethylene oxide) (PEO) + salt + water ATPSs. Standard transfer parameters (Gibbs free energy change (ΔtrGº), enthalpy change (ΔtrHº) and entropy change (TΔtrSº)) were evaluated, and their dependence on the dye structure, electrolyte nature and tie line length (TLL). All phenothiazine dyes are concentrated predominantly in the polymer enriched phase, with ΔtrGº values ranging from -4.1 up to -13.4 kJ mol-1. Due to the dye-PEO attractive interactions that occur mainly via benzene condensed ring present in the structures of phenothiazine dyes, the partitioning of these dyes was enthalpically driven, with -11.4 ≥ ΔtrHº ≥ -52 kJ mol-1 and -4.93 ≥ TΔtrSº ≥ -38 kJ mol-1.Sociedade Brasileira de Química2020-08-21T16:37:14Z2020-08-21T16:37:14Z2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfCOELHO, Y. L. et al. New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems. Journal of the Brazilian Chemical Society, São Paulo, v. 31, n. 8, p. 1700-1713, 2020.http://repositorio.ufla.br/jspui/handle/1/42560Journal of the Brazilian Chemical Societyreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessCoelho, Yara L.Agudelo, Álvaro J. P.Ferreira, Guilherme M. D.Ferreira, Gabriel M. D.Castro, Alan S. B. deHudson, Eliara A.Pires, Ana Clarissa S.Silva, Luis H. M. daeng2020-08-21T16:37:14Zoai:localhost:1/42560Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-08-21T16:37:14Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
title New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
spellingShingle New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
Coelho, Yara L.
Aqueous two-phase system
Thermodynamic
Phenothiazine dye
Driving force
Sistema aquoso de duas fases
Termodinâmica
Corante fenotiazina
Força motriz
title_short New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
title_full New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
title_fullStr New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
title_full_unstemmed New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
title_sort New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
author Coelho, Yara L.
author_facet Coelho, Yara L.
Agudelo, Álvaro J. P.
Ferreira, Guilherme M. D.
Ferreira, Gabriel M. D.
Castro, Alan S. B. de
Hudson, Eliara A.
Pires, Ana Clarissa S.
Silva, Luis H. M. da
author_role author
author2 Agudelo, Álvaro J. P.
Ferreira, Guilherme M. D.
Ferreira, Gabriel M. D.
Castro, Alan S. B. de
Hudson, Eliara A.
Pires, Ana Clarissa S.
Silva, Luis H. M. da
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Coelho, Yara L.
Agudelo, Álvaro J. P.
Ferreira, Guilherme M. D.
Ferreira, Gabriel M. D.
Castro, Alan S. B. de
Hudson, Eliara A.
Pires, Ana Clarissa S.
Silva, Luis H. M. da
dc.subject.por.fl_str_mv Aqueous two-phase system
Thermodynamic
Phenothiazine dye
Driving force
Sistema aquoso de duas fases
Termodinâmica
Corante fenotiazina
Força motriz
topic Aqueous two-phase system
Thermodynamic
Phenothiazine dye
Driving force
Sistema aquoso de duas fases
Termodinâmica
Corante fenotiazina
Força motriz
description Aqueous two-phase systems (ATPSs) have proven to be efficient and environmentally safe methods for extracting chemical species. However, the driving forces behind the partition of solutes in these systems are still little understood. A complete thermodynamic partitioning of phenothiazine dyes was investigated in poly(ethylene oxide) (PEO) + salt + water ATPSs. Standard transfer parameters (Gibbs free energy change (ΔtrGº), enthalpy change (ΔtrHº) and entropy change (TΔtrSº)) were evaluated, and their dependence on the dye structure, electrolyte nature and tie line length (TLL). All phenothiazine dyes are concentrated predominantly in the polymer enriched phase, with ΔtrGº values ranging from -4.1 up to -13.4 kJ mol-1. Due to the dye-PEO attractive interactions that occur mainly via benzene condensed ring present in the structures of phenothiazine dyes, the partitioning of these dyes was enthalpically driven, with -11.4 ≥ ΔtrHº ≥ -52 kJ mol-1 and -4.93 ≥ TΔtrSº ≥ -38 kJ mol-1.
publishDate 2020
dc.date.none.fl_str_mv 2020-08-21T16:37:14Z
2020-08-21T16:37:14Z
2020
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 COELHO, Y. L. et al. New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems. Journal of the Brazilian Chemical Society, São Paulo, v. 31, n. 8, p. 1700-1713, 2020.
http://repositorio.ufla.br/jspui/handle/1/42560
identifier_str_mv COELHO, Y. L. et al. New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems. Journal of the Brazilian Chemical Society, São Paulo, v. 31, n. 8, p. 1700-1713, 2020.
url http://repositorio.ufla.br/jspui/handle/1/42560
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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