Preparation and luminescence properties of hybrid materials containing europium(III) complexes covalently bonded to a silica matrix
Data(s) |
2002
|
---|---|
Resumo |
A new kind of luminescent organic-inorganic hybrid material (denoted Hybrid I) consisting of europium 1,10-phenanthroline complexes covalently attached to a silica-based network was prepared by a sol-gel process. 1,10-Phenanthroline grafted to 3-(triethoxysilyl)propyl isocyanate was used as one of the precursors for the preparation of an organic-inorganic hybrid materials. For comparison purposes, the hybrid material (denoted Hybrid II) in which phenanthroline was not grafted onto the silica backbone of the frameworks was also prepared. Elemental analysis; NMR, FT-IR, UV/vis absorption, and luminescence spectroscopies, and luminescence decay analysis were used to characterize the obtained hybrid materials. It is shown that the homogeneity of Hybrid I is superior to that of Hybrid II, and a higher concentration europium can be incorporated into Hybrid I than Hybrid II. Excitation at the ligand absorption wavelength (283 nm) resulted in the strong emission of the Eu3+ D-5(0)-F-7(J) (J = 0-4) transition lines as a result of the efficient energy transfer from the ligands to the EU3+ in Hybrid I. The number of water molecules coordinated to the europium ion was estimated, and the structure of the as-synthesized Hybrid I was predicted on the basis of the experimental results. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Li HR;Lin J;Zhang HJ;Fu LS;Meng QG;Wang SB.Preparation and luminescence properties of hybrid materials containing europium(III) complexes covalently bonded to a silica matrix,CHEMISTRY OF MATERIALS,2002,14(9):3651-3655 |
Palavras-Chave | #SOL-GEL PROCESS #LANTHANIDE COMPLEXES #IONS #ACCESSIBILITY #TERBIUM(III) #CHEMISTRY #BEHAVIOR #PROBES #DYES |
Tipo |
期刊论文 |