Near-infrared/visible-emitting nanosilica modified with silylated Ru(II) and Ln(III) complexes
Nenhuma Miniatura disponível
Data
2020-01-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Resumo
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.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Nanotechnology, v. 31, n. 3, 2020.