邻菲啰啉缩单胺类席夫碱衍生物及其铕配合物的合成和光物理性能研究

Synthesis and Photophysical Properties of Phenanthroline Monoamine Schiff Base Derivatives and Their Europium Complexes

为改变稀土铕配合物的配体类型,寻找红光强度更好的材料,以Eu(Ⅲ)为中心原子,乙酰丙酮(acac)为第一配体,3个邻菲啰啉缩单胺类席夫碱衍生物作为第二配体,成功合成了3种新的铕金属的配合物.测试了3种配合物的紫外、荧光光谱,探讨了其光物理性能.结果表明:随着第二配体结构共轭程度增加,在紫外区的吸收逐渐增强.其荧光发射峰均为约613 nm,归属为Eu3+的5D0→7F2能级间的跃迁,3种配合物在紫外灯下均发出明亮的红光.

In order to change the ligand type of the rare earth europium complexes and develop materials of better red light emission, three novel europium complexes were synthesized with Eu（Ⅲ） as the central atom, acetylacetone （ acac） as the first ligand, and three phenanthroline monoamine schiff base derivatives as the respective second ligand. The complexes were tested with UV and fluorescence spectra and their photophysical properties were also discussed. The results showed that the absorption in the UV region was enhanced gradually with the increase of the conjugation degree of the second ligand. The fluorescence emission peak was at about 613 nm attributed to the 5 D0→7 F2 characteristic transition of Eu3＋. All three complexes emitted bright red fluorescence under UV exposure.