Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations

Detalhes bibliográficos
Autor(a) principal: Duro, Miguel Angel Iglesias
Data de Publicação: 2010
Outros Autores: Gonzalez-Olmos, R., Cota, I., Medina, F.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/5661
Resumo: Acesso restrito: Texto completo. p. 802-808
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spelling Duro, Miguel Angel IglesiasGonzalez-Olmos, R.Cota, I.Medina, F.Duro, Miguel Angel IglesiasGonzalez-Olmos, R.Cota, I.Medina, F.2012-04-19T14:00:44Z20101385-8947http://www.repositorio.ufba.br/ri/handle/ri/5661v. 162, n. 2Acesso restrito: Texto completo. p. 802-808A serie of substituted amines based ionic liquids was prepared using an aliphatic linear carboxylic acid (pentanoic acid). The ionic liquids synthesised are 2-hydroxy ethylammonium pentanoate (2-HEAPE), 2-hydroxy diethylammonium pentanoate (2-HDEAPE) and 2-hydroxy triethylammonium pentanoate (2-HTEAPE). FT-IR spectra establishes their ionic salt structure. The influence of structural variations on their thermodynamic properties (density, ultrasonic velocity, ionic conductivity, refractive index, viscosity and surface tension) was investigated, as a function of temperature in the range 278.15–338.15 K. In the compounds studied here, the anion has strong effect on the properties if compared with previous studies of the authors, when shorter chains were used. It was found that the elongation of the alkyl chain causes the pronounced depression of fluidity and ionic conductivity. The observed temperature trend of the studied properties points out the special packing of these ionic liquids, as well as, the strong influence of the steric hindrance among linear aliphatic residues. We also describe the catalytic activity of these type of ionic liquids for a representative serie of aldol condensation processes. Conversions higher than 98% and selectivities higher than 85% were obtained. Moreover the catalysts are easily separated from reaction mixture and re-used, obtaining good conversions for at least three consecutive cycles. As a conclusion, it was found that simple structural modifications into anion length and degree of substitution provide a mechanism to manipulate the catalytic potency of these ionic liquids, as well as, tailor physico-chemical properties for potential end-use applications.Submitted by JURANDI DE SOUZA SILVA (jssufba@hotmail.com) on 2012-04-19T14:00:44Z No. of bitstreams: 1 __ac.els-cdn.com_S138589...e4af765fd2b4a9735a9009f5b2aa8.pdf: 323575 bytes, checksum: 727975a6c9fac907ab858015848fd098 (MD5)Made available in DSpace on 2012-04-19T14:00:44Z (GMT). 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dc.title.pt_BR.fl_str_mv Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
dc.title.alternative.pt_BR.fl_str_mv Chemical Engineering Journal
title Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
spellingShingle Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
Duro, Miguel Angel Iglesias
Protic ionic liquid
Physical properties
Temperature
Catalysis
Aldol condensation
title_short Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
title_full Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
title_fullStr Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
title_full_unstemmed Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
title_sort Brønsted ionic liquids: study of physico-chemical properties and catalytic activity in aldol condensations
author Duro, Miguel Angel Iglesias
author_facet Duro, Miguel Angel Iglesias
Gonzalez-Olmos, R.
Cota, I.
Medina, F.
author_role author
author2 Gonzalez-Olmos, R.
Cota, I.
Medina, F.
author2_role author
author
author
dc.contributor.author.fl_str_mv Duro, Miguel Angel Iglesias
Gonzalez-Olmos, R.
Cota, I.
Medina, F.
Duro, Miguel Angel Iglesias
Gonzalez-Olmos, R.
Cota, I.
Medina, F.
dc.subject.por.fl_str_mv Protic ionic liquid
Physical properties
Temperature
Catalysis
Aldol condensation
topic Protic ionic liquid
Physical properties
Temperature
Catalysis
Aldol condensation
description Acesso restrito: Texto completo. p. 802-808
publishDate 2010
dc.date.issued.fl_str_mv 2010
dc.date.accessioned.fl_str_mv 2012-04-19T14:00:44Z
dc.type.driver.fl_str_mv Artigo de Periódico
info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/5661
dc.identifier.issn.none.fl_str_mv 1385-8947
dc.identifier.number.pt_BR.fl_str_mv v. 162, n. 2
identifier_str_mv 1385-8947
v. 162, n. 2
url http://www.repositorio.ufba.br/ri/handle/ri/5661
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv DOI: 10.1016/j.cej.2010.06.008
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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