In Situ Assembly of Rare Earth/Polymer Luminescent Composite Material

In Situ Assembly of Rare Earth/Polymer Luminescent Composite Material
　　The main aim of my paper is selecting complexes with the excellent luminescent properties to develop a kind of practical rare earth polymer luminescent materials by in-situ method.In the first part, the composite material composed of the lanthanide ions and complexes doped ZnO/PEG host were prepared by sol-gel method. Sol-gel technology is the one of the most versatile methods for the preparation of inorganic-organic composites materials for its low processing temperature. In our paper, the terbium ions and four kinds of terbium complexes (The ligand of which is 2, 4-dihydroxybenzonic acid, 1, 10-phenanthroline, Acetylacetone and nicotinic acid, respectively) doped ZnO/PEG host were achieved at the room temperature, and the composite materials display Cube neodymium magnet excellent luminescent properties. As the experiment results show that adding the PEG as cover strengthens the energy transfer between the ZnO host and rare earth element without changing the crystal structure of ZnO, and the composites all emit the characteristic green luminescence of Tb3+ ion. By the same method, the composites material composed of the europium and dysprosium complexes (nicotinic acid as ligand) doped ZnO/PEG host were obtained and the samples exhibit the two kinds of lanthanide ions respective characteristic luminescence.In second part, the transparent hybrid thick films composed by [Ln-(2-HnicO)] [Ln-(2-HnicO) (phen)] (2-H2nicO = 2-Hydroxynicotinic) (Ln = Dy, Tb, Eu) and polymethyl methacrylate (PMMA) have been achieved by in-situ polymerization. The luminescence properties and energy transfer for these polymeric composite films were studied with absorption spectra, IR spectra, and http://www.chinamagnets.biz/  fluorescent emission spectra in detail. And the experiment results show all the hybrid thick films composed with dysprosium, terbium and europium coordination polymers show respective characteristic emission of the lanthanide ions, and these complexes can be dispersed in the PMMA homogeneously and they composed very uniformly to interpenetrate together. 更多还原