NDLI: Eu<sup>3+</sup> and Tb<sup>3+</sup> @ PSQ: Dual Luminescent Polyhedral Oligomeric Polysilsesquioxanes.

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Eu³⁺ and Tb³⁺ @ PSQ: Dual Luminescent Polyhedral Oligomeric Polysilsesquioxanes.

Content Provider	Europe PMC
Author	Marchesi, Stefano Miletto, Ivana Bisio, Chiara Gianotti, Enrica Marchese, Leonardo Carniato, Fabio
Editor	Watras, Adam
Copyright Year	2022
Abstract	The synthesis and characterization of novel luminescent amorphous POSS-based polysilsesquioxanes (PSQs) with Tb³⁺ and Eu³⁺ ions directly integrated in the polysilsesquioxane matrix is presented. Two different Tb³⁺/Eu³⁺ molar ratios were applied, with the aim of disclosing the relationships between the nature and loading of the ions and the luminescence properties. Particular attention was given to the investigation of site geometry and hydration state of the metal centers in the inorganic framework, and of the effect of the Tb³⁺ → Eu³⁺ energy transfer on the overall optical properties of the co-doped materials. The obtained materials were characterized by high photostability and colors of the emitted light ranging from orange to deep red, as a function of both the Tb³⁺/Eu³⁺ molar ratio and the chosen excitation wavelength. A good energy transfer was observed, with higher efficiency displayed when donor/sensitizer concentration was lower than the acceptor/activator concentration. The easiness of preparation and the possibility to finely tune the photoluminescence properties make these materials valid candidates for several applications, including bioimaging, sensors, ratiometric luminescence-based thermometers, and optical components in inorganic or hybrid light-emitting devices.
Journal	Materials (Basel)
Volume Number	15
DOI	10.3390/ma15227996
PubMed Central reference number	PMC9694933
Issue Number	22
PubMed reference number	36431482
e-ISSN	19961944
Language	English
Publisher	Molecular Diversity Preservation International (MDPI)
Publisher Date	2022-11-12
Access Restriction	Open
Subject Keyword	silsesquioxane polysilsesquioxane POSS lanthanide europium terbium coordination luminescence energy transfer co-doped material
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science

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Eu3+ and Tb3+ @ PSQ: Dual Luminescent Polyhedral Oligomeric Polysilsesquioxanes.

Eu³⁺ and Tb³⁺ @ PSQ: Dual Luminescent Polyhedral Oligomeric Polysilsesquioxanes.