吡啶甲酰三氟丙酮稀土配合物的合成、表征和荧光性能研究

以稀土氯化物和吡啶甲酰三氟丙酮(NTA)为原料,在乙醇溶液中合成了四个新的无水二元稀土配合物RE(NTA)3 (RE = Sm,Eu,Tb,Dy).采用元素分析,UV和IR光谱法,推测了稀土配合物的组成和结构.利用TG-DTA方法,分析了稀土配合物的热稳定性.荧光光谱测定结果表明,吡啶甲酰三氟丙酮(NTA)是稀土的良好配体,能强烈敏化Sm(Ⅲ)和Eu(Ⅲ)发光,但与Tb(Ⅲ)和 Dy(Ⅲ)的能级匹配性差,只能发射β-二酮配体的荧光.     

Studies on synthesis and fluorescent property of rare earth complexes RE（ABMF）2AA and copolymers RE（ABMF）2AA-co-MMA

Four new complexes RE(ABMF)2AA (RE=Sm, Eu, Tb, Dy) were synthesized by the reaction of RECl3·6H2O with acrylic acid (HAA) and 1-(2-furyl)-3-phenyl-1,3-propanedione (ABMF). The copolymerization of the rare earth complexes with methyl methacrylate was studied by using 2,2-azobis-isobutyronitrile as an initiator. The composition and structure of the four complexes were characterized by elemental analysis, UV-vis and FTIR. The glass transition temperature and molecular weight of the copolymers were determined. Photoluminescent measurement showed that ligand ABMF could efficiently transfer the energy to Sm3+ and Eu3+ ions in the complexes and sensitize the luminescence of the rare earth ions, but could not sensitize Tb3+ and Dy3+ ions. As a result, both Sm3+ and Eu3+ complexes emitted the characteristic fluorescence of Sm3+ and Eu3+ ions due to the f-f transitions. The four copolymers could emit strong fluorescence of the rare earth ions.     

铕掺杂聚甲基丙烯酸甲酯的光致发光性能

利用不饱和二元羧酸3-己烯二酸(H2L)、1,10-邻菲咯啉(Phen)与稀土铕的氯化物EuCl3反应,合成了具有发光性能的稀土铕三元配合物Eu2L3Phen.4H2O。将铕配合物与聚甲基丙烯酸甲酯(PMMA)掺杂后,研究了掺杂型高分子材料的光致发光性能。研究结果表明,Eu配合物能发出很强的铕离子特征荧光,当配合物Eu2L3Phen.4H2O与聚甲基丙烯酸甲酯掺杂后,高分子材料仍能发出配合物Eu2L3Phen.4H2O的特征荧光,高分子材料的发光强度随着配合物在聚甲基丙烯酸甲酯中掺杂量的增加而增加。