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Near-infrared/visible-emitting nanosilica modified with silylated Ru(II) and Ln(III) complexes

Sábio, Rafael Miguel and Santagneli, Silvia Helena and Gressier, Marie and Caiut, José Maurício Almeida and Pazin, Wallance Moreira and Ribeiro, Sidney José Lima and Menu, Marie-Joëlle Near-infrared/visible-emitting nanosilica modified with silylated Ru(II) and Ln(III) complexes. (2019) Nanotechnology, 31 (3). 035602. ISSN 0957-4484

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Official URL: https://doi.org/10.1088/1361-6528/ab494f

Abstract

Three luminescent silica-based nanohybrids were fabricated by grafting of silylated Ru(II)andNd/Yb(III)complexes onto mesoporous silica nanoparticles obtained by microemulsion method.The prepared nanohybrids were characterized by Fourier transform-Raman spectroscopy, solidstate-nuclear magnetic resonance, high resolution-transmission electron microscopy andscanning and transmission electron microscopy techniques. The chemical integrity and thegrafting of all complexes inside MSNs nanopores as well as a good distribution of metalcomplexes onto MSNs surface were achieved for all nanohybrids. Photophysical results revealedthat by monitoring the excitation on Ru(II)moieties from SiO2–RuNd and SiO2–RuYb nanohybrids, the sensitization of NIR-emitting Nd/Yb(III)ions were successfully detected viaenergy transfer processes. Energy transfer rates(kEnT)of 0.20×107and 0.11×107s−1 and efficiencies of energy transfer(ηEnT)of 40% and 27.5% were obtained for SiO2–RuNd and SiO2–RuYb nanohybrids, respectively. These results confirm the preparation of promising dual(near-infrared/visible)-emitting silica-based nanohybrids as new nanotools for applications asnanosensores and nanomarkers.

Item Type:Article
HAL Id:hal-03153191
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Universidade Estadual Paulista - Unesp - Araraquara (BRAZIL)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Universidade de São Paulo - USP (BRAZIL)
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Deposited On:26 Feb 2021 09:49

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