resumo
Two kinds of bifunctional architectures combining the useful functions of a superparamagnetic nanoparticle and a near-infrared luminescent lanthanide complex into one material (denoted as Fe3O4@SiO2@Ln-PABI, PABI = N-(4-benzoic acid-yl)-N'-(propyltriethoxysilyl) urea, Ln = Nd and Yb) have been prepared via two main steps by a modified Stober method and the layer-by-layer assembly technique. The two obtained architectures have been characterized by FTIR spectra, X-ray diffraction, transmission electron microscopy, emission spectroscopy, and vibrating sample magnetometer. These bifunctional nanocomposites exhibit superparamagnetic behaviour, high fluorescence intensity and color purity. Such materials with superparamagnetic and lanthanide-based near-infrared luminescence properties have potential applications in the field of biological luminescent labels.
palavras-chave
LANTHANIDE COMPLEXES; SILICA SPHERES; NANOPARTICLES; ND(III); YTTERBIUM(III); LIGANDS; PHOTOLUMINESCENCE; SENSITIZATION; PROTEINS; YB(III)
categoria
Biochemistry & Molecular Biology; Biophysics; Chemistry
autores
Yu, SY; Fu, LS; Zhou, YJ; Su, HQ
nossos autores
Lianshe Fu
Investigador Auxiliaragradecimentos
The authors are grateful to the financial aid from the National Natural Science Foundation of China (Grant Nos. 20961006), Inner Mongolia Natural Science Foundation (Grant Nos. 20080404MS0201), and Inner Mongolia Technology Innovation and Guidance Funds. Shiyong Yu and Lianshe Fu thank FCT for financial supports: SFRH/BPD/44194/2008 and