有机电致发光材料具有主动发光、 视角广、 对比度高等显著特点。 稀土有机配合物电致发光材料目前备受广大研究者的关注。 以水杨醛和苯甲酸衍生物为原料, 经酯化、 肼化及希夫碱缩合合成了水杨醛对甲氧基苯甲酰腙(1-H₂L)、 水杨醛对甲基苯甲酰腙(2-H₂L)、 水杨醛对溴基苯甲酰腙(3-H₂L) 3种配体, 以Pr(NO₃)₃为原料, 合成了水杨醛酰腙系列镨稀土配合物, 经红外光谱、 紫外光谱等分析手段对该类配合物的结构进行表征, 配体在3 136~3 141 cm^-1出现羟基 ν(OH)伸缩振动峰, 在配合物的红外光谱中消失, 配合物在3 330~3 368 cm^-1之间的吸收峰归属为结晶的H₂O的 ν(O—H)羟基弯曲振动吸收峰, 配合物在与配体对应的3 140 cm^-1均不出现羟基吸收峰, 三种配体及配合物的吸收波形相似, 反映出配体及配合物的结构基本一致, 但配体与配合物的吸收波峰相差较大, 据此可推测配体已经配位。 采用荧光分光光度计测定了该类配合物的荧光光谱, 并讨论了配体取代基的变化对荧光强度的影响。 配体分别在352, 369, 365和417 nm波长监测下, 于517 nm处出现发射峰。 其中3-H₂L的荧光强度最高。 配合物均在470 nm的蓝光激发下, 分别于608和617 nm出现镨的电偶极跃迁特征发射峰, 归属于³ P₀→³ F₂跃迁。 配合物均可被470 nm蓝光激发, 在608~617 nm处有较好的红光发射, 该类荧光粉有望应用于OLED上进行应用。

Organic electroluminescent materials have significant features such as active illumination, wide viewing angle, and high contrast. Rare earth organic complex electroluminescent materials are currently attracting the attention of researchers. In this paper, salicylaldehyde and benzoic acid derivatives are used as raw materials to synthesize salicylaldehyde p-methoxybenzoyl hydrazide (1-H₂L) and salicylaldehyde p-methylbenzene by esterification, deuteration and Schiff base condensation. Synthesis of salicylaldoxime series lanthanum rare earth complexes with pyroglycol (2-H₂L), salicylaldehyde-bromobenzoylhydrazide (3-H₂L) ligands and Pr(NO₃)₃ as raw materials The structures of the complexes were characterized by infrared spectroscopy and ultraviolet spectroscopy. The ligand is a hydroxyl ν(OH) stretching vibration peak at 3 136~3 141 cm^-1, which disappears in the infrared spectrum of the complex. The absorption peak of the complex between 3 330~3 368 cm^-1 belongs to the crystallized H₂O. The (OH) hydroxyl bending vibration absorption peak, the complex does not have an absorption peak at the hydroxyl group of 3 140 cm^-1 corresponding to the ligand, and the absorption waveforms of the three ligands and complexes are similar, and the structure of the ligand and the complex are reacted basically consistent. However, the absorption peaks between the ligand and the complex have a large difference, and it can be inferred that the ligand has been coordinated. The fluorescence properties of the complexes were determined by fluorescence spectrophotometer. The effects of ligand substituents on the fluorescence intensity were discussed. The complexes can be excited by 470 nm blue light and have good red light emission at 608~617 nm. Such phosphors are expected to be applied on OLEDs.