Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/19971
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Felicio, Mario R. | pt |
dc.contributor.author | Nunes, Teresa G. | pt |
dc.contributor.author | Vaz, Patricia M. | pt |
dc.contributor.author | Botas, A. M. P. | pt |
dc.contributor.author | Ribeiro-Claro, Paulo | pt |
dc.contributor.author | Ferreira, Rute A. S. | pt |
dc.contributor.author | Freire, Ricardo O. | pt |
dc.contributor.author | Vaz, Pedro D. | pt |
dc.contributor.author | Carlos, Luis D. | pt |
dc.contributor.author | Nunes, Carla D. | pt |
dc.contributor.author | Nolasco, Mariela M. | pt |
dc.date.accessioned | 2017-12-07T19:31:07Z | - |
dc.date.issued | 2014 | pt |
dc.identifier.issn | 2050-7526 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/19971 | - |
dc.description.abstract | A regular MCM-41 type mesostructured silica was used as a support for the incorporation of the highly luminescent tris(beta-diketonate) complex Eu(tta)(3)ephen yielding the hybrid MCM-Eu material. Suitable characterization by powder X-ray diffraction (XRD), thermogravimetric analyses (TGA), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), C-13 and Si-21 solid state NMR spectroscopy and photoluminescence was accomplished. The combination of ultraviolet-visible spectroscopy (UV-Vis) and photoluminescence techniques shows that the complex incorporation seems to modify essentially the second Eu3+ coordination shell. For a material that has a simply impregnated lanthanide complex, the herein reported maximum D-5(0) quantum yield value of 0.31 is a significantly high value, being almost in the same scale of the values obtained for the materials with covalently bonded complexes. A detailed theoretical photoluminescence study of the MCM-Eu with the recently developed Luminescence Package - LUMPAC is presented. The high accuracy of the theoretical calculations is achieved through the comparison with the experimental values. Aiming at a deeper understanding of the photoluminescence process, the ligand-to-Eu3+ intramolecular energy transfer and back-transfer rates were also predicted. The dominant pathway involves the energy transfer between the lowest energy ligand triplet and the D-5(0) level (9.70 x 10(7) s(-1)). | pt |
dc.language.iso | eng | pt |
dc.publisher | ROYAL SOC CHEMISTRY | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/132936/PT | pt |
dc.relation | info:eu-repo/grantAgreement/FCT/COMPETE/132964/PT | pt |
dc.rights | restrictedAccess | por |
dc.subject | ORGANIC-INORGANIC HYBRIDS | pt |
dc.subject | INTRAMOLECULAR ENERGY-TRANSFER | pt |
dc.subject | EMISSION QUANTUM YIELD | pt |
dc.subject | RARE-EARTH COMPLEX | pt |
dc.subject | MESOPOROUS SILICA | pt |
dc.subject | COORDINATION-COMPOUNDS | pt |
dc.subject | SPECTROSCOPIC PROPERTIES | pt |
dc.subject | PHOTOPHYSICAL PROPERTIES | pt |
dc.subject | LANTHANIDE LUMINESCENCE | pt |
dc.subject | DIFFERENTIAL-OVERLAP | pt |
dc.title | Modelling the luminescence of extended solids: an example of a highly luminescent MCM-41 impregnated with a Eu3+ beta-diketonate complex | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 9701 | pt |
degois.publication.issue | 45 | pt |
degois.publication.lastPage | 9711 | pt |
degois.publication.title | JOURNAL OF MATERIALS CHEMISTRY C | pt |
degois.publication.volume | 2 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.relation.publisherversion | 10.1039/c4tc01072h | pt |
dc.identifier.doi | 10.1039/c4tc01072h | pt |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Modelling the luminescence of extended solids An example of a highly luminescent MCM-41 impregnated with a Eu3+ β-diketonate complex_10.1039c4tc01072h.pdf | 803.08 kB | Adobe PDF |
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