Probing the local environment of hybrid materials designed from ionic liquids and synthetic clay by Raman spectroscopy

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dc.contributor.authorSiqueira, Leonardo J. A. [UNIFESP]
dc.contributor.authorConstantino, Vera R. L.
dc.contributor.authorCamilo, Fernanda F. [UNIFESP]
dc.contributor.authorTorresi, Roberto M.
dc.contributor.authorTemperini, Marcia L. A.
dc.contributor.authorRibeiro, Mauro C. C.
dc.contributor.authorIzumi, Celly M. S.
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2016-01-24T14:35:28Z
dc.date.available2016-01-24T14:35:28Z
dc.date.issued2014-03-25
dc.description.abstractHybrid organic-inorganic material containing Laponite clay and ionic liquids forming cations have been prepared and characterized by FT-Raman spectroscopy, X-ray diffraction, and thermal analysis. the effect of varying the length of the alkyl side chain and conformations of cations has been investigated by using different ionic liquids based on piperidinium and imidazolium cations. the structure of the N,N-butyl-methyl-piperidinium cation and the assignment of its vibrational spectrum have been further elucidated by quantum chemistry calculations. the X-ray data indicate that the organic cations are intercalated parallel to the layers of the clay. Comparison of Raman spectra of pure ionic liquids with different anions and the resulting solid hybrid materials in which the organic cations have been intercalated into the clay characterizes the local environment experienced by the cations in the hybrid materials. the Raman spectra of hybrid materials suggest that the local environment of all confined cations, in spite of this diversity in properties, resembles the liquid state of ionic liquids with a relatively disordered structure. (C) 2013 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniversidade Federal de São Paulo, Inst Ciencias Quim Farmaceut & Ambientais, Lab Mat Hibridos, BR-09913030 Diadema, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Quim, BR-05513970 São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Inst Ciencias Quim Farmaceut & Ambientais, Lab Mat Hibridos, BR-09913030 Diadema, SP, Brazil
dc.description.sourceWeb of Science
dc.format.extent469-475
dc.identifierhttp://dx.doi.org/10.1016/j.saa.2013.11.084
dc.identifier.citationSpectrochimica Acta Part A-molecular and Biomolecular Spectroscopy. Oxford: Pergamon-Elsevier B.V., v. 122, p. 469-475, 2014.
dc.identifier.doi10.1016/j.saa.2013.11.084
dc.identifier.issn1386-1425
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/37559
dc.identifier.wosWOS:000332438300063
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofSpectrochimica Acta Part A-molecular and Biomolecular Spectroscopy
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.subjectClayen
dc.subjectIonic liquiden
dc.subjectRaman spectroscopyen
dc.subjectHybrid materialen
dc.titleProbing the local environment of hybrid materials designed from ionic liquids and synthetic clay by Raman spectroscopyen
dc.typeinfo:eu-repo/semantics/article
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