dc.creator | Castillero Durán, Pedro | es |
dc.creator | Roales, Javier | es |
dc.creator | Lopes da Costa, Tania Isabel | es |
dc.creator | Sánchez Valencia, Juan Ramón | es |
dc.creator | Barranco Quero, Ángel | es |
dc.creator | Rodríguez González-Elipe, Agustín | es |
dc.creator | Pedrosa, José María | es |
dc.date.accessioned | 2017-05-17T12:01:51Z | |
dc.date.available | 2017-05-17T12:01:51Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Castillero, P., Roales, J., Lopes-Costa, T., Sánchez Valencia, J.R., Barranco Quero, Á., Rodríguez González-Elipe, A. y Pedrosa, J.M. (2017). Optical gas sensing of ammonia and amines based on protonated porphyrin/TiO2 composite thin films. Sensors, 17 (1), 1-14. | |
dc.identifier.issn | 1424-8220 | es |
dc.identifier.uri | http://hdl.handle.net/11441/59971 | |
dc.description.abstract | Open porous and transparent microcolumnar structures of TiO2 prepared by physical
vapour deposition in glancing angle configuration (GLAD-PVD) have been used as host
matrices for two different fluorescent cationic porphyrins, 5-(N-methyl 4-pyridyl)-10,15,20-triphenyl
porphine chloride (MMPyP) and meso-tetra (N-methyl 4-pyridyl) porphine tetrachloride (TMPyP).
The porphyrins have been anchored by electrostatic interactions to the microcolumns by self-assembly
through the dip-coating method. These porphyrin/TiO2 composites have been used as gas sensors
for ammonia and amines through previous protonation of the porphyrin with HCl followed
by subsequent exposure to the basic analyte. UV–vis absorption, emission, and time-resolved
spectroscopies have been used to confirm the protonation–deprotonation of the two porphyrins and
to follow their spectral changes in the presence of the analytes. The monocationic porphyrin has been
found to be more sensible (up to 10 times) than its tetracationic counterpart. This result has been
attributed to the different anchoring arrangements of the two porphyrins to the TiO2 surface and
their different states of aggregation within the film. Finally, there was an observed decrease of the
emission fluorescence intensity in consecutive cycles of exposure and recovery due to the formation
of ammonium chloride inside the film. | es |
dc.description.sponsorship | Junta de Andalucía FQM-2310 | es |
dc.description.sponsorship | EU-FEDER | es |
dc.description.sponsorship | Ministerio de Economía y Competitividad MAT2013-42900-P MAT2014-57652-C2-2-R MAT2015-69035-REDC MINECO-CSIC 201560E055 PCIN-2015-169-C02-02 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Multidisciplinary Digital Publishing Institute (MDPI) | es |
dc.relation.ispartof | Sensors, 17 (1), 1-14. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | MMPyP | es |
dc.subject | TMPyP | es |
dc.subject | TiO2 | es |
dc.subject | GLAD-PVD | es |
dc.subject | Optically active composites | es |
dc.subject | Ammonia and amine gas sensing | es |
dc.subject | Porous thin films | es |
dc.title | Optical gas sensing of ammonia and amines based on protonated porphyrin/TiO2 composite thin films | 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.projectID | FQM-2310 | es |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO/MAT2013-42900-P | es |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO/MAT2014-57652-C2-2-R | es |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO/MAT2015-69035-REDC | es |
dc.relation.projectID | MINECO-CSIC | es |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO/201560E055 | es |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO/PCIN-2015-169-C02-02 | es |
dc.relation.publisherversion | 10.3390/s17010024 | es |
dc.identifier.doi | 10.3390/s17010024 | es |
idus.format.extent | 14 p. | es |
dc.journaltitle | Sensors | es |
dc.publication.volumen | 17 | es |
dc.publication.issue | 1 | es |
dc.publication.initialPage | 1 | es |
dc.publication.endPage | 14 | es |