dc.creator | Roales, Javier | es |
dc.creator | Pedrosa, José María | es |
dc.creator | Gómez Guillén, M. | es |
dc.creator | Lopes da Costa, Tania Isabel | es |
dc.creator | Castillero Durán, Pedro | es |
dc.creator | Barranco Quero, Ángel | es |
dc.creator | Rodríguez González-Elipe, Agustín | es |
dc.date.accessioned | 2017-04-11T11:55:12Z | |
dc.date.available | 2017-04-11T11:55:12Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Roales, J., Pedrosa, J.M., Gómez Guillén, M., Lopes Costa, T., Castillero Durán, P., Barranco Quero, Á. y Rodríguez González-Elipe, A. (2015). Free-Base Carboxyphenyl Porphyrin Films Using a TiO2 Columnar Matrix: Characterization and Application as NO2 Sensors. Sensors, 15 (5), 11118-11132. | |
dc.identifier.issn | 1424-8220 | es |
dc.identifier.uri | http://hdl.handle.net/11441/57478 | |
dc.description.abstract | The anchoring effect on free-base carboxyphenyl porphyrin films using TiO2
microstructured columns as a host matrix and its influence on NO2 sensing have been
studied in this work. Three porphyrins have been used: 5-(4-carboxyphenyl)10,15,20-
triphenyl-21H,23H-porphyrin (MCTPP); 5,10,15,20-tetrakis(4-carboxyphenyl)-21H,23Hporphyrin
(p-TCPP); and 5,10,15,20-tetrakis(3-carboxyphenyl)-21H,23H-porphyrin
(m-TCPP). The analysis of UV-Vis spectra of MCTPP/TiO2, p-TCPP/TiO2 and
m-TCPP/TiO2 composite films has revealed that m-TCPP/TiO2 films are the most stable,
showing less aggregation than the other porphyrins. IR spectroscopy has shown that
m-TCPP is bound to TiO2 through its four carboxylic acid groups, while p-TCPP is
anchored by only one or two of these groups. MCTPP can only be bound by one carboxylic
acid. Consequently, the binding of p-TCPP and MCTPP to the substrate allows them to
form aggregates, whereas the more fixed anchoring of m-TCPP reduces this effect. The
exposure of MCTPP/TiO2, p-TCPP/TiO2 and m-TCPP/TiO2 films to NO2 has resulted in
important changes in their UV-Vis spectra, revealing good sensing capabilities in all cases.
The improved stability of films made with m-TCPP suggests this molecule as the best candidate among our set of porphyrins for the fabrication of NO2 sensors. Moreover, their
concentration-dependent responses upon exposure to low concentrations of NO2 confirm
the potential of m-TCPP as a NO2 sensor | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Multidisciplinary Digital Publishing Institute (MDPI) | es |
dc.relation.ispartof | Sensors, 15 (5), 11118-11132. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Carboxyphenyl porphyrin | es |
dc.subject | Microstructured TiO2 film | es |
dc.subject | NO2 | es |
dc.subject | Optical gas sensor | es |
dc.subject | Thin film | es |
dc.title | Free-Base Carboxyphenyl Porphyrin Films Using a TiO2 Columnar Matrix: Characterization and Application as NO2 Sensors | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Química Inorgánica | es |
dc.relation.publisherversion | 10.3390/s150511118 | es |
idus.format.extent | 15 p. | es |
dc.journaltitle | Sensors | es |
dc.publication.volumen | 15 | es |
dc.publication.issue | 5 | es |
dc.publication.initialPage | 11118 | es |
dc.publication.endPage | 11132 | es |