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含共轭结构氮杂环的非离子嵌段共聚物能与铕(Ⅲ)络合反应形成发光配合物,研究了该发光配合物的配位结构及其荧光性能。以聚苯乙烯-聚4-乙烯基吡啶(PS-b-P4VP)作为高分子配体,以邻菲罗啉(Phen)作为小分子配体,通过吡啶环的氮原子与Eu(Ⅲ)离子配位发生络合反应形成了以网状的Eu(Ⅲ)-P4VP核层以及PS链段为壳层的共聚物-稀土配合物,通过电子透射电镜(TEM)分析了其微观形态结构。用荧光分光光度计分别表征了嵌段聚合物-稀土铕(III)配合物不同链段的荧光发光强度并且进行了荧光强度的对比。此外,还研究了不同的Eu(Ⅲ)离子浓度对荧光强度的影响,得到了制备共聚物-稀土配合物荧光的最佳Eu(Ⅲ)离子浓度。
The non-ionic block copolymer containing a heterocyclic nitrogen heterocycle can form a luminescent complex with europium (Ⅲ) complex. The coordination structure and fluorescence properties of the luminescent complex were studied. Polystyrene-poly 4-vinylpyridine (PS-b-P4VP) was used as the polymer ligand and phenanthroline (Phen) as the small molecule ligand. Complexation reaction took place to form a copolymer-rare earth complex with networked Eu (III) -P4VP core layer and PS segment as shell layer. The microstructure of the copolymer was analyzed by electron transmission electron microscopy (TEM). Fluorescence spectrophotometer were used to characterize the fluorescence intensity of the different segments of the block polymer-rare earth europium (III) complex and the fluorescence intensities were compared. In addition, the influence of different Eu (Ⅲ) ion concentration on the fluorescence intensity was also studied. The optimum concentration of Eu (Ⅲ) ions for preparing the copolymer-rare earth complex fluorescence was obtained.