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http://hdl.handle.net/10773/21008
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DC Field | Value | Language |
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dc.contributor.author | Lahoud, M. G. | pt |
dc.contributor.author | Frem, R. C. G. | pt |
dc.contributor.author | Galico, D. A. | pt |
dc.contributor.author | Bannach, G. | pt |
dc.contributor.author | Nolasco, M. M. | pt |
dc.contributor.author | Ferreira, R. A. S. | pt |
dc.contributor.author | Carlos, L. D. | pt |
dc.date.accessioned | 2017-12-07T20:07:17Z | - |
dc.date.issued | 2016 | pt |
dc.identifier.issn | 0022-2313 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/21008 | - |
dc.description.abstract | Lanthanide-based coordination compounds of molecular formula [Ln(keto)(3)(H2O)], where Ln=Gd, Eu and keto=ketoprofen, were synthesized and their photoluminescence features were detailed in the 12-300 K interval. The emission spectra of [Eu(keto)(3)(H2O)] reveal a strong dependence with the temperature, well-illustrated by an unusual large blue-shift (similar to 17 cm(-1)) of the D-5(0)-> F-7(0) transition as the temperature is raised. The arithmetic difference between the absorption spectrum of [Eu(keto)(3)(H2O)] with that of [Gd(keto)(3)(H2O)] pointed out the presence of a ligand-to-metal charge transfer (LMCT) band (320-370 nm). From the [Gd(keto)(3)(H2O)] phosphorescence the energy of the keto-related triplet states was determined showing a large overlap with the intra-4f(6) levels and a strong electron-phonon coupling. The high-resonance between the LMCT and triplet states and the Eu3+ levels leads to a strong dependence of the D-5(0) lifetime value, typical of the presence of operative energy transfer processes. (C) 2015 Elsevier B.V. All rights reserved. | pt |
dc.language.iso | eng | pt |
dc.publisher | ELSEVIER SCIENCE BV | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | TEMPERATURE-MEASUREMENTS | pt |
dc.subject | SENSITIZED LUMINESCENCE | pt |
dc.subject | TRIVALENT LANTHANIDES | pt |
dc.subject | EUROPIUM(III) IONS | pt |
dc.subject | SOLID KETOPROFEN | pt |
dc.subject | IN-VITRO | pt |
dc.subject | COMPLEXES | pt |
dc.subject | FLUORESCENCE | pt |
dc.subject | LINEWIDTH | pt |
dc.subject | LIFETIMES | pt |
dc.title | Intriguing light-emission features of ketoprofen-based Eu(III) adduct due to a strong electron-phonon coupling | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 357 | pt |
degois.publication.lastPage | 363 | pt |
degois.publication.title | JOURNAL OF LUMINESCENCE | pt |
degois.publication.volume | 170 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1016/j.jlumin.2015.08.050 | pt |
dc.identifier.doi | 10.1016/j.jlumin.2015.08.050 | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Intriguing light-emission features of ketoprofen-based Eu(III) adduct due to a strong electron-phonon coupling_10.1016j.jlumin.2015.08.050.pdf | 1.46 MB | Adobe PDF |
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