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dc.contributor.authorde Souza, Tereza Pereira
dc.contributor.authorChaimovich, Hernan
dc.contributor.authorFahr, Alfred
dc.contributor.authorSchweitzer, Bianca
dc.contributor.authorNeto, Augusto Agostinho [UNESP]
dc.contributor.authorCuccovia, Iolanda Midea
dc.identifier.citationJournal of Colloid and Interface Science. San Diego: Academic Press Inc. Elsevier B.V., v. 371, p. 62-72, 2012.
dc.description.abstractInterfacial concentrations of chloride and bromide ions, with Li+, Na+, K+, Rb+, Cs+, trimethylammonium (TMA(+)), Ca2+, and Mg2+ as counterions, were determined by chemical trapping in micelles formed by two zwitterionic surfactants, namely N-hexadecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (HPS) and hexadecylphosphorylcholine (HDPC) micelles. Appropriate standard curves for the chemical trapping method were obtained by measuring the product yields of chloride and bromide salts with 2,4,6-trimethyl-benzenediazonium (BF4) in the presence of low molecular analogs (N,N,N-trimethyl-propane sulfonate and methyl-phosphorylcholine) of the employed surfactants. The experimentally determined values for the local Br- (Cl-) concentrations were modeled by fully integrated non-linear Poisson Boltzmann equations. The best fits to all experimental data were obtained by considering that ions at the interface are not fixed at an adsorption site but are free to move in the interfacial plane. In addition, the calculation of ion distribution allowed the estimation of the degree of ion coverage by using standard chemical potential differences accounting for ion specificity. (C) 2012 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipInstituto Nacional de Ciência e Tecnologia de Fluidos Complexos (INCT-FCx)
dc.description.sponsorshipAlexander von Humboldt Foundation
dc.publisherAcademic Press Inc. Elsevier B.V.
dc.relation.ispartofJournal of Colloid and Interface Science
dc.sourceWeb of Science
dc.subjectIonic selectivityen
dc.subjectChemical trappingen
dc.subjectZwitterionic micellesen
dc.titleInterfacial concentrations of chloride and bromide in zwitterionic micelles with opposite dipoles: Experimental determination by chemical trapping and a theoretical descriptionen
dcterms.rightsHolderAcademic Press Inc. Elsevier B.V.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniv Jena
dc.contributor.institutionEmpresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (EPAGRI)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUniv São Paulo, Inst Quim, Dept Bioquim, BR-05508900 São Paulo, Brazil
dc.description.affiliationUniv Jena, Inst Pharm, Dept Pharmaceut Technol, D-07743 Jena, Germany
dc.description.affiliationEPAGRI, Empresa Pesquisa Agr & Extensao Rural Santa Catar, Cacador, SC, Brazil
dc.description.affiliationUNESP, Inst Biociencias Letras & Ciencias Exatas, Dept Fis, BR-15054350 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Biociencias Letras & Ciencias Exatas, Dept Fis, BR-15054350 Sao Jose do Rio Preto, SP, Brazil
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dc.description.sponsorshipIdFAPESP: 07/50970-5
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt
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