Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/24327 |
Resumo: | Inverse gas chromatography was used to obtain the activity coefficients at infinite dilution (γ13∞) of several organic solutes and water in the thermotropic ionic liquid crystal phases of both [C12mim][BF4] and [C14mim][BF4] and their isotropic phases. In the smectic to isotropic transition, a change in the linear representation of the natural logarithm of γ13∞ with the reciprocal temperature was observed for [C14mim][BF4], and was more evident for alkanes, alkylbenzenes, esters, and alcohols, that can be related to structural modifications of the stationary phase. Results are interpreted in terms of the enthalpic and entropic contributions of solute-IL interactions. Selectivities and capacities of important separation problems, such as octane/benzene and cyclohexane/benzene, were calculated and compared with literature values for separating agents such as N-methyl-2-pyrrolidinone, sulfolane, and ionic liquids presenting the [BF4]- anion combined with several imidazolium-based cations. It is shown that to achieve maximum separation efficiency, imidazolium cations with short alkyl chain lengths such as [C2mim][BF4] should be used, whereas high capacities require larger alkyl chain lengths. |
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Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquidsInverse gas chromatography was used to obtain the activity coefficients at infinite dilution (γ13∞) of several organic solutes and water in the thermotropic ionic liquid crystal phases of both [C12mim][BF4] and [C14mim][BF4] and their isotropic phases. In the smectic to isotropic transition, a change in the linear representation of the natural logarithm of γ13∞ with the reciprocal temperature was observed for [C14mim][BF4], and was more evident for alkanes, alkylbenzenes, esters, and alcohols, that can be related to structural modifications of the stationary phase. Results are interpreted in terms of the enthalpic and entropic contributions of solute-IL interactions. Selectivities and capacities of important separation problems, such as octane/benzene and cyclohexane/benzene, were calculated and compared with literature values for separating agents such as N-methyl-2-pyrrolidinone, sulfolane, and ionic liquids presenting the [BF4]- anion combined with several imidazolium-based cations. It is shown that to achieve maximum separation efficiency, imidazolium cations with short alkyl chain lengths such as [C2mim][BF4] should be used, whereas high capacities require larger alkyl chain lengths.This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 and UIDP/50011/2020 and CIMO-Mountain Research Center, UIDB/00690/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES. M.A.R.M. acknowledges financial support from NORTE-01-0145-FEDER-000006 funded by NORTE2020 through PT2020 and ERDF. S.M.V.B. acknowledges FCT for his Ph.D. grant SFRH/BD/138149/2018. P.J.C. acknowledges FCT for his contract under the Investigator FCT 2015 contract number IF/00758/2015.Biblioteca Digital do IPBMartins, Mónia A.R.Vilas-Boas, Sérgio M.Cordova, Isabella WeberCarvalho, Pedro J.Domańska, UrszulaFerreira, OlgaCoutinho, João A.P.Pinho, Simão2018-01-19T10:00:00Z20212021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/24327engMartins, Mónia A.R.; Vilas-Boas, Sérgio M.; Cordova, Isabella Weber; Carvalho, Pedro J.; Domańska, Urszula; Ferreira, Olga; Coutinho, João A.P.; Pinho, Simão P. (2021). Infinite Dilution Activity Coefficients in the Smectic and Isotropic Phases of Tetrafluoroborate-Based Ionic Liquids. Journal of Chemical and Engineering Data. ISSN 0021-9568. 66:6, p. 2587-25960021-956810.1021/acs.jced.1c00182info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-12-20T01:18:19Zoai:bibliotecadigital.ipb.pt:10198/24327Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:15:10.794899Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids |
title |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids |
spellingShingle |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids Martins, Mónia A.R. |
title_short |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids |
title_full |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids |
title_fullStr |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids |
title_full_unstemmed |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids |
title_sort |
Infinite dilution activity coefficients in the smectic and isotropic phases of Tetrafluoroborate-based ionic liquids |
author |
Martins, Mónia A.R. |
author_facet |
Martins, Mónia A.R. Vilas-Boas, Sérgio M. Cordova, Isabella Weber Carvalho, Pedro J. Domańska, Urszula Ferreira, Olga Coutinho, João A.P. Pinho, Simão |
author_role |
author |
author2 |
Vilas-Boas, Sérgio M. Cordova, Isabella Weber Carvalho, Pedro J. Domańska, Urszula Ferreira, Olga Coutinho, João A.P. Pinho, Simão |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Martins, Mónia A.R. Vilas-Boas, Sérgio M. Cordova, Isabella Weber Carvalho, Pedro J. Domańska, Urszula Ferreira, Olga Coutinho, João A.P. Pinho, Simão |
description |
Inverse gas chromatography was used to obtain the activity coefficients at infinite dilution (γ13∞) of several organic solutes and water in the thermotropic ionic liquid crystal phases of both [C12mim][BF4] and [C14mim][BF4] and their isotropic phases. In the smectic to isotropic transition, a change in the linear representation of the natural logarithm of γ13∞ with the reciprocal temperature was observed for [C14mim][BF4], and was more evident for alkanes, alkylbenzenes, esters, and alcohols, that can be related to structural modifications of the stationary phase. Results are interpreted in terms of the enthalpic and entropic contributions of solute-IL interactions. Selectivities and capacities of important separation problems, such as octane/benzene and cyclohexane/benzene, were calculated and compared with literature values for separating agents such as N-methyl-2-pyrrolidinone, sulfolane, and ionic liquids presenting the [BF4]- anion combined with several imidazolium-based cations. It is shown that to achieve maximum separation efficiency, imidazolium cations with short alkyl chain lengths such as [C2mim][BF4] should be used, whereas high capacities require larger alkyl chain lengths. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-19T10:00:00Z 2021 2021-01-01T00:00:00Z |
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 |
http://hdl.handle.net/10198/24327 |
url |
http://hdl.handle.net/10198/24327 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Martins, Mónia A.R.; Vilas-Boas, Sérgio M.; Cordova, Isabella Weber; Carvalho, Pedro J.; Domańska, Urszula; Ferreira, Olga; Coutinho, João A.P.; Pinho, Simão P. (2021). Infinite Dilution Activity Coefficients in the Smectic and Isotropic Phases of Tetrafluoroborate-Based Ionic Liquids. Journal of Chemical and Engineering Data. ISSN 0021-9568. 66:6, p. 2587-2596 0021-9568 10.1021/acs.jced.1c00182 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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