噻吩甲酰三氟丙酮-邻菲罗啉Schiff碱衍生物-铕配合物制备和光电性能研究

Preparation and photoelectric properties of thenoyltrifluoroacetone-phenanthroline Schiff base derivatives-europium complexes

为了寻找更好的红色发光材料,利用噻吩甲酰三氟丙酮(tta)为第一配体;引入羧基(—COOH)、羟基(—OH)和硝基(—NO2)等基团,合成了四个邻菲罗啉单胺席夫碱衍生物作为第二配体,以Eu(Ⅲ)为中心原子,成功合成了四种铕金属的配合物,并进行了结构表征,测试了配合物的紫外、荧光光谱,探讨了其光物理和电化学性质。结果表明:随着第二配体结构共轭程度增加,稀土离子的发光效率增高。其荧光发射峰均为约613nm,归属为Eu3+5 D0→7F2能级间的跃迁,与循环伏安法得到的铕配合物荧光发射波长吻合。

In order to find a better red luminescent materials,thenoyltrifluoroacetone(tta)was used as the first ligand.Four phenanthroline monoamine Schiff base derivatives were synthesized with the groups such as hydroxyl(—COOH),hydroxy(—OH)and nitro(—NO2)as the second ligand,Eu(Ⅲ)as the central atom,and four europium metal complexes were synthesized.The photophysical and electrochemical properties of the complexes were also investigated.The results showed that with the increase of the conjugation degree of the second ligand structure,the molecular rigidity is higher.Therefore,the higher the luminous efficiency of rare earth ions,the absorption in the UV region gradually increased.The fluorescence emission peak is about 612 nm,which belongs to the transition between Eu^(3+ 5) D0 →~7F_2 energy level,and coincides with the fluorescence emission wavelength of europium complex obtained by cyclic voltammetry.