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

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dc.contributor.authorCoelho, Yara Luiza
dc.contributor.authorPatino Agudelo, Alvaro Javier
dc.contributor.authorFerreira, Guilherme Max Dias
dc.contributor.authorFerreira, Gabriel Max Dias
dc.contributor.authorCastro, Alan Stampini Benhame de
dc.contributor.authorHudson, Eliara Acipreste
dc.contributor.authorPires, Ana Clarissa dos Santos
dc.contributor.authorSilva, Luis Henrique Mendes da
dc.date.accessioned2021-12-15T15:17:59Z
dc.date.available2021-12-15T15:17:59Z
dc.date.issued2020pt_BR
dc.description.abstractAqueous 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.pt_BR
dc.identifier.citationCOELHO, Y. L. et al. New insights into the partitioning of phenothiazine dyes in aqueous two-phase systems. Journal of the Brazilian Chemical Society, v. 31, n. 8, p. 1700-1713, 2020. Disponível em: <https://www.scielo.br/j/jbchs/a/N7gGwQgQQ9fXKwTwy4s9Kyc/abstract/?lang=en&format=html>. Acesso em: 10 jun. 2021.pt_BR
dc.identifier.doihttps://doi.org/10.21577/0103-5053.20200056pt_BR
dc.identifier.issn1678-4790
dc.identifier.urihttp://www.repositorio.ufop.br/jspui/handle/123456789/14241
dc.language.isoen_USpt_BR
dc.rightsabertopt_BR
dc.rights.licenseThis is an open-access article distributed under the terms of the Creative Commons Attribution License. Fonte: o PDF do artigo.pt_BR
dc.subjectThermodynamicpt_BR
dc.subjectDriving forcept_BR
dc.titleNew insights into the partitioning of phenothiazine dyes in aqueous two-phase systems.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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