Author(s): Sábio, Rafael Miguel [UNESP] ; Santagneli, Silvia Helena [UNESP] ; Gressier, Marie ; Caiut, José Maurício Almeida ; Pazin, Wallance Moreira ; Ribeiro, Sidney José Lima [UNESP] ; Menu, Marie-Joëlle
Date: 2020
Persistent ID: http://hdl.handle.net/11449/201245
Origin: Oasisbr
Made available in DSpace on 2020-12-12T02:27:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01
Three luminescent silica-based nanohybrids were fabricated by grafting of silylated Ru(II) and Nd/Yb(III) complexes onto mesoporous silica nanoparticles obtained by microemulsion method. The prepared nanohybrids were characterized by Fourier transform-Raman spectroscopy, solid state-nuclear magnetic resonance, high resolution-transmission electron microscopy and scanning and transmission electron microscopy techniques. The chemical integrity and the grafting of all complexes inside MSNs nanopores as well as a good distribution of metal complexes onto MSNs surface were achieved for all nanohybrids. Photophysical results revealed that by monitoring the excitation on Ru(II) moieties from SiO 2-RuNd and SiO 2-RuYb nanohybrids, the sensitization of NIR-emitting Nd/Yb(III) ions were successfully detected via energy transfer processes. Energy transfer rates (k EnT) of 0.20 × 107 and 0.11 × 107 s-1 and efficiencies of energy transfer (η EnT) of 40% and 27.5% were obtained for SiO 2-RuNd and SiO 2-RuYb nanohybrids, respectively. These results confirm the preparation of promising dual (near-infrared/visible)-emitting silica-based nanohybrids as new nanotools for applications as nanosensores and nanomarkers.
Institute of Chemistry Saõ Paulo State University UNESP
CIRIMAT Université de Toulouse CNRS INPT UPS, 118 route de Narbonne
Departamento de Química Faculdade de Filosofia Ciências e Letras de Ribeiraõ Preto Universidade de Saõ Paulo
Departamento de Física Faculdade de Filosofia Ciências e Letras de Ribeiraõ Preto Universidade de Saõ Paulo
Institute of Chemistry Saõ Paulo State University UNESP
