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Mesostructure and Physical Properties of Aqueous Mixtures of the Ionic Liquid 1-Ethyl-3-Methyl Imidazolium Octyl Sulfate Doped With Divalent Sulfate Salts in the Liquid and the Mesomorphic States
dc.contributor.author | Cabeza, Óscar | |
dc.contributor.author | Segade, Luisa | |
dc.contributor.author | Domínguez-Pérez, Montserrat | |
dc.contributor.author | Rilo, Esther | |
dc.contributor.author | Ausín, David | |
dc.contributor.author | Martinelli, Anna | |
dc.contributor.author | Yaghini, Negin | |
dc.contributor.author | Gollas, Bernhard | |
dc.contributor.author | Kriechbaum, Manfred | |
dc.contributor.author | Russina, Olga | |
dc.contributor.author | Triolo, Alessandro | |
dc.contributor.author | López Lago, Elena | |
dc.contributor.author | Varela, Luis M. | |
dc.date.accessioned | 2024-01-25T20:56:08Z | |
dc.date.available | 2024-01-25T20:56:08Z | |
dc.date.issued | 2018-03-03 | |
dc.identifier.citation | O. Cabeza, L. Segade, M. Domínguez-Pérez, E. Rilo, D. Ausín, A. Martinelli, N. Yaghini, B. Gollas, M. Kriechbaum, O. Russina, A. Triolo, E. López-Lago and L. M. Varela, Mesostructure and physical properties of aqueous mixtures of the ionic liquid 1-ethyl-3-methyl imidazolium octyl sulfate doped with divalent sulfate salts in the liquid and the mesomorphic states, Phys. Chem. Chem. Phys., 2018, 20, 8724–8736. DOI: 10.1039/C7CP07999K | es_ES |
dc.identifier.issn | 1463-9084 | |
dc.identifier.uri | http://hdl.handle.net/2183/35174 | |
dc.description | This is the accepted manuscript of the article. | es_ES |
dc.description.abstract | [Abstract] This paper extends the study of the induced temperature change in the mesostructure and in the physical properties occurring in aqueous mixtures of the ionic liquid 1-ethyl-3-methyl imidazolium octyl-sulfate [EMIm][OSO4]. For some compositions, these mixtures undergo a phase transition between the liquid (isotropic in the mesoscale) and the mesomorphic state (lyotropic liquid crystalline) at about room temperature. The behavior of mixtures doped with a divalent metal sulfate was investigated in order to observe their applicability as electrolytes. Calcium sulfate salt is almost insoluble even in the 20 wt% water mixture. The magnesium salt, in contrast, can be dissolved up to concentrations of 730 ppm in the same mixture and it has a profound impact on its properties. Six aqueous mixtures (with water content from 10 wt% to 33 wt%) of [EMIm][OSO4] were saturated with magnesium sulfate salt, producing the ternary mixture [EMIm][OSO4] + H2O + MgSO4. Viscosity, density and ionic conductivity for these samples were measured from 10 °C to 90 °C. In addition, SAXS, FTIR, diffussion NMR and Raman spectroscopy of the most interesting samples have been performed, and structural data indicate a transition between a hexagonal lyotropic liquid crystalline phase below and an isotropic solution phase above room temperature. The octyl sulfate anions of the cylindrical micelles in the hexagonal phase are coordinated with water molecules through H-bonds (about four per sulfate anion), while the [EMIm] cations seem to be poorly coordinated and so free to move. Inorganic salt addition reinforces that network, increasing the phase transition temperature. | es_ES |
dc.description.sponsorship | The authors are grateful to the technician M. Cabanas for some of the great quality measurements and also to UEM, UEPM and UM of SAI from UDC. This work was supported by MINECO from the Spanish Government (Grants No. MAT2014-57943-C3-1-P, MAT2014-57943-C3-2-P and MAT2014-57943-C3-3-P), COST program Action CM 1206 EXIL, and by the Xunta de Galicia through the research projects Network on Ionic Liquids, REGALIs (CN 2014/015), AGRU 2015/11 and GDR ED413C 2016/001. Research projects have been co-financed by the European Regional Development Fund (FEDER). A. M. and N. Y. acknowledge the financial support from the ÅForsk Foundation in Sweden (grant no. 16-644, 2016). We also acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities and would like to thank Dr E. Di Cola and T. Narayanan for their kind and competent assistance in exploiting beamline ID02 | es_ES |
dc.description.sponsorship | Xunta de Galicia; AGRU 2015/11 | es_ES |
dc.description.sponsorship | Xunta de Galicia; ED413C 2016/001 | es_ES |
dc.description.sponsorship | ÅForsk Foundation in Sweden; 16-644, 2016 | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Royal Society of Chemistry (Gran Bretaña) | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2014-57943-C3-1-P/ES/LIQUIDOS IONICOS DOPADOS CON SALES COMO ELECTROLITOS AVANZADOS PARA DISPOSITIVOS ELECTROQUIMICOS Y FOTONICOS | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2014-57943-C3-2-P/ES/CARACTERIZACION OPTICA DE LIQUIDOS Y GELES IONICOS PARA SU APLICACION EN DISPOSITIVOS FOTONICOS Y ELECTROQUIMICOS/ | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2014-57943-C3-3-P/ES/APLICACION DE LIQUIDOS IONICOS DOPADOS CON SALES COMO ELECTROLITOS AVANZADOS PARA DISPOSITIVOS ELECTROQUIMICOS Y FOTONICOS/ | es_ES |
dc.relation.uri | https://doi.org/10.1039/C7CP07999K | es_ES |
dc.rights | This journal is © The Royal Society of Chemistry 2018 | es_ES |
dc.title | Mesostructure and Physical Properties of Aqueous Mixtures of the Ionic Liquid 1-Ethyl-3-Methyl Imidazolium Octyl Sulfate Doped With Divalent Sulfate Salts in the Liquid and the Mesomorphic States | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.access | info:eu-repo/semantics/openAccess | es_ES |
UDC.journalTitle | Physical Chemistry Chemical Physics | es_ES |
UDC.volume | 20 (2018) | es_ES |
UDC.issue | 13 (07 April) | es_ES |
UDC.startPage | 8724 | es_ES |
UDC.endPage | 8736 | es_ES |
dc.identifier.doi | 10.1039/C7CP07999K |