邻菲啰啉衍生物及其铕配合物的合成、表征及光物理性能

为改变铕配合物配体的结构,增强其紫外-可见吸收率,寻找红光效率更高的发光材料,以乙酰丙酮为第一配体,邻菲啰啉及其衍生物为第二配体,合成了5个稀土铕配合物,并进行了1H NMR、MS、IR、元素分析等表征,测定了目标配合物的紫外、荧光光谱和电化学性质.结果表明:随着第二配体共轭结构的变化,铕配合物在紫外区的吸收逐渐增强,荧光发射峰均约为612 nm,发光强度随配体共轭程度的增加而增大;电化学数据与铕配合物的发射波长相匹配,证明强紫外-可见吸收率配体的引入极大地提高了配合物发光效率.

Synthesis, Characterization and Photophysical Properties of Phenanthroline Derivatives and Their Europium Complexes

In order to find red fluorescence materials of higher efficiency, the ligand structure of europium (Eu) complexes was changed to enhance its UV-Vis absorption. Five europium complexes were synthesized with acetylacetone as the first ligand, while phenanthroline and its derivatives as the second ligand. The structure of these Eu complexes was characterized by ¹H NMR, MS, IR and elemental analysis. Their ultraviolet spectrum, fluorescence spectrum and electrochemical properties were also studied. The UV absorption increased with the change of conjugation of the second ligand. The fluorescence emission peak remained at 612 nm but the intensity increased with the increase of ligand conjugation. The electrochemical data of the complexes coincided with photophysical properties, further evidencing that the introduction of the ligand with strong UV-Vis absorption could greatly improve luminous efficiency.