Molecular-based upconversion in homo/heterogeneous liquids and in micro/nanostructured solid materials
Latterini, Loredana (Università di Perugia. Dipartimento di Chimica)
Massaro, Giuseppina (Università di Perugia. Dipartimento di Chimica)
Penconi, Marta (Università di Perugia. Dipartimento di Chimica)
Gentili, Pier Luigi (Università di Perugia. Dipartimento di Chimica)
Roscini, Claudio (Institut Català de Nanociència i Nanotecnologia)
Ortica, Fausto (Università di Perugia. Dipartimento di Chimica)

Data:	2018
Resum:	Radiation upconversion can be an elegant and efficient strategy to minimize waste in energy harvesting and storage processes. The upconversion based on triplet-triplet annihilation processes of molecular dyes is a very versatile approach, but it requires a systematic photophysical characterization of the systems to optimize the upconversion yields and develop materials for technological applications. This paper represents an overview of the work carried out in our laboratories for the study and characterization of a molecular dye pair, 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin platinum(ii) (PtOEP) and 1,3,6,8-tetraphenylpyrene (TPPy), suitable as the sensitizer and emitter, respectively, in a triplet-triplet annihilation based upconversion process. The investigation has been carried out in various media with increasing complexity. First, we used the dye pair to characterize the UC-efficiencies in homogeneous solvents of different viscosities and in oil-in-water microemulsions; then we explored the possibility to achieve upconversion in solid materials, like nanostructured silica matrices and liquid filled microcapsules. The possibility to achieve upconversion emission even in confined and rigid media has been confirmed and can inspire further applications of the process.
Ajuts:	Ministerio de Economía y Competitividad MAT2015-70615-R Ministerio de Economía y Competitividad SEV-2013-0295
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	Efficient strategy ; Nanostructured silica ; Oil-in-water microemulsions ; Photophysical characterization ; Technological applications ; Triplet-triplet annihilation ; Up-conversion emission ; Up-conversion process
Publicat a:	Dalton transactions, Vol. 47, Issue 26 (July 2018) , p. 8557-8565, ISSN 1477-9234

DOI: 10.1039/c8dt00020d
PMID: 29790520

Preprint 6 p, 363.1 KB

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