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为了获得高光效、高稳定性能的发光材料,探讨β-萘甲酸(β-NPA)化合物在发光材料方面的应用,合成了Eu(Ⅲ)与β-NPA及2-噻吩甲酰三氟丙酮(HTTA)形成的二元、三元荧光配合物。对所合成的配合物利用元素分析、紫外可见光谱、红外光谱、荧光光谱等手段进行了表征。对稀土配合物的结构与发光性能之间的关系进行了探讨。表征结构表明,两个配合物的组成分别为Eu(β-NPA)_3·3H_2O和Eu(β-NPA)(TTA)_2·2H_2O;紫外光谱研究表明,β-NPA与铕离子配位后整个体系的共轭程度增大,使得配合物的紫外吸收能力增强;荧光光谱研究显示,与铕离子反应后的配合物的配体β-NPA、2-HTTA能将吸收的能量有效地传递给铕离子,从而使配合物发射出强的铕离子的特征荧光,且两个配合物Eu(β-NPA)_3·3H_2O,Eu(β-NPA)(TTA)_2·2H_2O均以~5D_0→~7F_2跃迁的荧光发射最强。得到了两种高效的红色荧光配合物Eu(β-NPA)_3·3H_2O,Eu(β-NPA)(TTA)_2·2H_2O,它们可望成为制备鲜艳红色发光材料的侯选。
In order to obtain luminescent materials with high luminous efficiency and high stability, the application of β-naphthoic acid (β-NPA) compounds in luminescent materials was discussed. Eu (Ⅲ), β-NPA and 2-butanoyltrifluoroacetone HTTA) formed binary, ternary fluorescent complexes. The synthesized complexes were characterized by means of elemental analysis, UV-visible spectrum, infrared spectrum and fluorescence spectrum. The relationship between the structure and luminescent properties of rare earth complexes was discussed. The characterization of the structure showed that the composition of the two complexes were Eu (β-NPA) 3 · 3H 2 O and Eu (β-NPA) (TTA) 2 · 2H 2 O. UV spectroscopy showed that the coordination of β-NPA with europium ions The conjugation degree of the system increased, which made the UV absorption capacity of the complex enhanced. Fluorescence spectroscopy showed that the ligands β-NPA and 2-HTTA which complexed with europium ions could effectively transfer the absorbed energy to europium Ions, so that the complex emits the characteristic fluorescence of strong europium ion. The two complexes Eu (β-NPA) _3 · 3H_2O and Eu (β-NPA) (TTA) _2 · 2H_2O all show the characteristic fluorescence at ~ 5D_0 → ~ 7F_2 The transitions have the strongest fluorescence emission. Two highly efficient red fluorescent complexes Eu (β-NPA) _3 · 3H_2O and Eu (β-NPA) (TTA) _2 · 2H_2O have been obtained, which are expected to become candidates for the preparation of bright red luminescent materials.