Multimetallic porphyrins/polyoxotungstate modified electrodes by layer-by-layer method: Electrochemical, spectroscopic and morphological characterization

Simple item page
dc.contributor.authorGarcia, Macarena
dc.contributor.authorCarfuman, Karla
dc.contributor.authorDiaz, Carlos
dc.contributor.authorGarrido, Carlos
dc.contributor.authorOsorio Roman, Igor
dc.contributor.authorJesus Aguirre, M.
dc.contributor.authorIsaacs, Mauricio
dc.date.accessioned2024-01-10T13:50:49Z
dc.date.available2024-01-10T13:50:49Z
dc.date.issued2012
dc.description.abstractThis work describes the formation of modified electrodes layer-by-layer assembly of a mu-{meso-5,10,15,20-tetra(pyridyl)porphyrin}terrakis{bis(bipyridine)chloride ruthenium(II)} coordinated with Zn(II) and Mn(III) in its central cavity and an anionic polyoxotungstate [SiW12O40](4-). The bilayer formation was monitored using electrochemical and UV-vis techniques, following the oxidation process of the Ru-III/II couple and the absorbance of the Soret band of porphyrin complexes respectively. It was possible to form 10 stable bilayers onto ITO surface. SEM studies were carried out finding that the morphology of the film depends on the metal center in the porphyrin. The thickness of these films was estimated as 0.603 mu m for (Zn(II)TRP](4+)/[SiW12O40](4-) and 2.18 mu m for [Mn(III)TRP](5+)/[[SiW12O40](4-) modified electrodes respectively. Raman spectroscopy showed that new bands appeared for [Mn(III)TRP](5+)/[SIW12O40](4-) assembly confirming stronger interactions than only electrostatic forces.
dc.description.abstractKinetics parameters such as charge transfer coefficient, alpha, and heterogeneous electron transfer rate constant, k(s) were obtained for both electrodes.
dc.description.abstractUsing electrochemical and UV-vis data it was possible to estimate the energy levels involved in the charge transfer process through the films formed.
dc.description.abstractSensor properties of [Zn(II)TRP](4+)/(SiW12O40](4-) modified electrode toward chlorite oxidation was tested. The results show electrocatalytic activity, amperometric determination demonstrate a detection limit of 13.8 mu M. (C) 2012 Elsevier Ltd. All rights reserved.
dc.description.funderFONDECYT
dc.description.funderCONICYT
dc.fechaingreso.objetodigital2024-04-16
dc.format.extent9 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.electacta.2012.07.039
dc.identifier.eissn1873-3859
dc.identifier.issn0013-4686
dc.identifier.urihttps://doi.org/10.1016/j.electacta.2012.07.039
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79558
dc.identifier.wosidWOS:000309307200051
dc.information.autorucQuímica;Diaz C;S/I;217990
dc.information.autorucQuímica;Isaacs M;S/I;1009751
dc.information.autorucQuímica;Osorio I;S/I;207713
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final398
dc.pagina.inicio390
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.revistaELECTROCHIMICA ACTA
dc.rightsacceso restringido
dc.subjectModified electrodes
dc.subjectLayer-by-layer
dc.subjectPorphyrins
dc.subjectPolyoxometalate
dc.subjectElectrocatalysis
dc.subjectGLASSY-CARBON ELECTRODE
dc.subjectELECTROCATALYTIC OXYGEN REDUCTION
dc.subjectSENSITIVE AMPEROMETRIC SENSOR
dc.subjectTETRARUTHENATED NICKEL
dc.subjectRAMAN-SCATTERING
dc.subjectCHLORITE ION
dc.subjectPORPHYRIN
dc.subjectFILMS
dc.subjectPOLYOXOMETALATE
dc.subjectFABRICATION
dc.titleMultimetallic porphyrins/polyoxotungstate modified electrodes by layer-by-layer method: Electrochemical, spectroscopic and morphological characterization
dc.typeartículo
dc.volumen80
sipa.codpersvinculados217990
sipa.codpersvinculados1009751
sipa.codpersvinculados207713
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Multimetallic porphyrins polyoxotungstate modified electrodes by layer-by-layer method Electrochemical, spectroscopic and morphological characterization.pdf
Size:
3.23 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas