Lanthanide Complexes Of Functional Nanospheres And Their Functional Composite Materials

In this paper, poly(styrene-co-methacrylicacid)[P(St-co-MAA)] functional nanospheres were synthesized by emulsifier-free emulsion copolymerization. Then ternary complexes of RE³⁺ with P(St-co-MAA) nanospheres, acetylacetone(acac) and 1,10-phenanthroline(phen) as ligands were prepared. In the end, the RE³⁺ film was prepared by doping ternary complexes of RE³⁺ in P(MMA-co-MAA).Light scattering apparatus, transmission electron microscopy(TEM) were used to determine the size and morphology of P(St-co-MAA) nanospheres. FT-IR spectra and fluorescence spectra were applied to characterize the configuration and property of functional nanospheres, ternary complexes of RE³⁺ and RE³⁺ complex film. The results were as follows:1. P(St-co-MAA) nanospheres with monodisperse size distribution were prepared by emulsifier-free emulsion copolymerization of styrene and methacrylicacid.2. The ternary complexes of RE³⁺ could emit their strong typical fluorescence under ultraviolet (UV) radiation, which resulted from efficient energy transfer from P(St-co-MAA) nanospheres, acac and phen to the central ions(RE³⁺). The fluorescent intensity could be enhanced by increasing the content of P(St-co-MAA) nanospheres.3. The ternary complexes of RE³⁺ film displayed better fluorescent property than RE³⁺ complexes, which resulted from efficient energy transfer from P(MMA-co-MAA) to RE³⁺ . "Concentration quench effect" didn't appear with a relative high content of RE³⁺, which indicated that the complex reaction of RE³⁺ was carried out thoroughly before doping. The RE³⁺ possessed excellent dispersion in the complexes. In addition, the application of these materials were improved since RE³⁺ complexes film had fine mechanics property and transparency.