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http://hdl.handle.net/10773/20195
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DC Field | Value | Language |
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dc.contributor.author | Moura, Nuno M. M. | pt |
dc.contributor.author | Nunez, Cristina | pt |
dc.contributor.author | Santos, Sergio M. | pt |
dc.contributor.author | Faustino, M. Amparo F. | pt |
dc.contributor.author | Cavaleiro, Jose A. S. | pt |
dc.contributor.author | Almeida Paz, Filipe A. | pt |
dc.contributor.author | Neves, M. Graca P. M. S. | pt |
dc.contributor.author | Capelo, Jose Luis | pt |
dc.contributor.author | Lodeiro, Carlos | pt |
dc.date.accessioned | 2017-12-07T19:38:42Z | - |
dc.date.issued | 2014 | pt |
dc.identifier.issn | 0947-6539 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/20195 | - |
dc.description.abstract | A new 3,5-disubstituted pyridine with two porphyrin moieties was prepared through an efficient synthetic approach involving 2-formyl-5,10,15,20-tetraphenylporphyrin (1), piperidine, and catalytic amounts of [La(OTf)(3)]. 3,5-Bis(5,10,15,20-tetraphenylporphyrin-2-ylmethyl)pyridine (2) was fully characterized and its sensing ability towards Zn2+, Cu2+, Hg2+, Cd2+, and Ag+ was evaluated in solution by absorption and fluorescence spectroscopy and in gas phase by using matrix-assisted laser desorption/ionization (MALDI)-TOF mass spectrometry. Strong changes in the ground and excited state were detected in the case of the soft metal ions Zn2+, Cd2+, Hg2+, and Cu2+. A three-metal-per-ligand molar ratio was obtained in all cases and a significant ratiometric behavior was observed in the presence of Zn2+ with the appearance of a new band at 608nm, which can be assigned to a metal-to-ligand charge transfer. The system was able to quantify 79ppb of Zn2+ and the theoretical calculations are in accordance with the stoichiometry observed in solution. The gas-phase sensorial ability of compound 2 towards all metal ions was confirmed by using MALDI-TOF MS and in solid state by using polymeric films of polymethylmethacrylate (PMMA) doped with ligand 2. The results showed that compound 2 can be analytically used to develop new colorimetric molecular devices that are able to discriminate between Hg2+ and Zn2+ in solid phase. The crystal structure of Zn-II complex of 3,5-bisporphyrinylpyridine was unequivocally elucidated by using single-crystal X-ray diffraction studies. | pt |
dc.language.iso | eng | pt |
dc.publisher | WILEY-V C H VERLAG GMBH | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/132997/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/132936/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/132972/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F84216%2F2012/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F64752%2F2009/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | BETA-CONDENSATION REACTIONS | pt |
dc.subject | SUPPORTED DEVICES | pt |
dc.subject | HIGH SELECTIVITY | pt |
dc.subject | FORCE-FIELD | pt |
dc.subject | MERCURY | pt |
dc.subject | CHEMOSENSORS | pt |
dc.subject | RECOGNITION | pt |
dc.subject | SENSOR | pt |
dc.subject | LUMINESCENCE | pt |
dc.subject | POLYAMINES | pt |
dc.title | A New 3,5-Bisporphyrinylpyridine Derivative as a Fluorescent Ratiometric Probe for Zinc Ions | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 6684 | pt |
degois.publication.issue | 22 | pt |
degois.publication.lastPage | 6692 | pt |
degois.publication.title | CHEMISTRY-A EUROPEAN JOURNAL | pt |
degois.publication.volume | 20 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1002/chem.201402270 | pt |
dc.identifier.doi | 10.1002/chem.201402270 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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A New 35-Bisporphyrinylpyridine Derivative as a Fluorescent Ratiometric Probe for Zinc Ions_10.1002chem.201402270.pdf | 1.69 MB | Adobe PDF |
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