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dc.contributor.author
Martini, María Belén
dc.contributor.author
Adam, Claudia Guadalupe
dc.contributor.author
Fernandez, Jose Luis
dc.date.available
2022-09-12T12:29:33Z
dc.date.issued
2021-08
dc.identifier.citation
Martini, María Belén; Adam, Claudia Guadalupe; Fernandez, Jose Luis; Significant effects of the anion on the catalytic behaviour of sulfonic acid-functionalized ionic liquids in transesterification reactions – A combined electrochemical/catalytic study; Elsevier; Molecular Catalysis; 513; 8-2021; 1-11
dc.identifier.issn
2468-8231
dc.identifier.uri
http://hdl.handle.net/11336/168288
dc.description.abstract
This work studies the strong influence of the counterion on the performance of ionic liquids (ILs) with sulfonic acid-functionalized butyl-imidazolic bases as homogeneous acid catalysts. Through a voltammetric analysis, it was shown that the availability of protons from the sulfonic acid groups in ILs with chloride and bisulphate anions is quite different, thus affecting their intrinsic activity as acid catalysts. The study was focused on the chlorides and bisulphates of 1-(4-sulfonic acid)-butyl-3-methylimidazolium ([bsmim]) and 1-(4-sulfonic acid)-butyl-imidazolium ([bsHim]), and the test reaction to evaluate these ILs as catalysts was the transesterification of p-nitrophenyl acetate with methanol. In ILs with counterion bisulphate, protons at the sulfonic acid groups are deeply involved in building the IL´s H-bonded network, so the acceptable catalytic activity for the tested reaction that was verified on these ILs was mostly sustained by the free sulphuric acid that was always present with the ionic pairs. On the contrary, ILs with chloride counterion conform more loosen networks where protons from the sulfonic acid groups are readily available and allow to efficiently catalyse the reaction, independently of the amounts of free hydrochloric acid that may be along with the ionic pair. Remarkably, the same contrast was verified in the catalytic performances of bisulphate and chloride of the non-sulfonated base 1-butyl-imidazolium ([bHim]), where the imidazolic hydrogen acted as an efficient acid catalyst only in [bHim]Cl.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ACID CATALYSIS
dc.subject
ANION EFFECTS
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CYCLIC VOLTAMMETRY
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TASK-SPECIFIC IONIC LIQUIDS
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TRANSESTERIFICATION
dc.subject.classification
Química Orgánica
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Significant effects of the anion on the catalytic behaviour of sulfonic acid-functionalized ionic liquids in transesterification reactions – A combined electrochemical/catalytic study
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-09-06T20:51:46Z
dc.journal.volume
513
dc.journal.pagination
1-11
dc.journal.pais
Reino Unido
dc.description.fil
Fil: Martini, María Belén. Universidad Nacional del Litoral. Instituto de Química Aplicada del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Química Aplicada del Litoral.; Argentina
dc.description.fil
Fil: Adam, Claudia Guadalupe. Universidad Nacional del Litoral. Instituto de Química Aplicada del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Química Aplicada del Litoral.; Argentina
dc.description.fil
Fil: Fernandez, Jose Luis. Universidad Nacional del Litoral. Instituto de Química Aplicada del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Química Aplicada del Litoral.; Argentina
dc.journal.title
Molecular Catalysis
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S2468823121004387
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.mcat.2021.111821
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