New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
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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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 |
_version_ |
1815438992125984768 |