Brilliant yellow dye immobilized on silica and silica/titania based hybrid xerogels containing bridged positively charged 1,4-diazoniabicyclo[2.2.2]octane: Preparation, characterization and electrochemical properties study

dc.creatorArenas, LT
dc.creatorGay, DSF
dc.creatorMoro, CC
dc.creatorDias, SLP
dc.creatorAzambuja, DS
dc.creatorCosta, TMH
dc.creatorBenvenutti, EV
dc.creatorGushikem, Y
dc.date2008
dc.date37073
dc.date2014-11-15T03:17:05Z
dc.date2015-11-26T16:30:36Z
dc.date2014-11-15T03:17:05Z
dc.date2015-11-26T16:30:36Z
dc.date.accessioned2018-03-28T23:11:39Z
dc.date.available2018-03-28T23:11:39Z
dc.identifierMicroporous And Mesoporous Materials. Elsevier Science Bv, v. 112, n. 41699, n. 273, n. 283, 2008.
dc.identifier1387-1811
dc.identifierWOS:000256713300031
dc.identifier10.1016/j.micromeso.2007.09.043
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/63269
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/63269
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/63269
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1270001
dc.descriptionSilica and silica/titania based hybrid xerogels containing the double charged 1,4-diazoniabicyclo[2.2.2]octane group bonded in a bridged way were obtained. The hybrids were characterized by infrared spectroscopy and CHN analyses for the identification and determination of organic content. N(2) adsorption-desorption isotherms and SEM were applied to study morphological and textural aspects. The hybrid materials presented anion-exchange properties that allowed their use as adsorbent for brilliant yellow anionic dye. These modified materials were used to prepare carbon paste electrodes for cyclic voltammetric measurements, where the brilliant yellow, for the first time, was applied as electroactive species. The pH solution has no effect on the anodic peak potential and anodic peak current in the values range between 2.0 and 7.0. The electrode response was invariant under various oxidation-reduction cycles showing that the system is chemically very stable. Considering that the presence of titanium oxide in the xerogel enhanced the conductivity, a carbon paste electrode of the (R(2)dabco)BY/SiO(2)/TiO(2) material was prepared to study the electrocatalytic oxidation of ascorbic acid by cyclic voltammetric and chronoamperometric techniques. (C) 2007 Elsevier Inc. All rights reserved.
dc.description112
dc.description41699
dc.description273
dc.description283
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationMicroporous And Mesoporous Materials
dc.relationMicroporous Mesoporous Mat.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectsol-gel
dc.subjectbrilliant yellow
dc.subjectorganofunctionalized silicas
dc.subjectascorbic acid
dc.subjectvitamin C
dc.subjectSol-gel
dc.subjectAscorbic-acid
dc.subjectLiquid-chromatography
dc.subjectTitanium(iv) Oxide
dc.subjectStationary-phase
dc.subjectSurface
dc.subjectElectrode
dc.subjectChloride
dc.subjectPolymer
dc.subjectSilsesquioxane
dc.titleBrilliant yellow dye immobilized on silica and silica/titania based hybrid xerogels containing bridged positively charged 1,4-diazoniabicyclo[2.2.2]octane: Preparation, characterization and electrochemical properties study
dc.typeArtículos de revistas


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