A novel class of efficient antenna complexes of Tb3+ based on the use of 3-phenyl-4-acyl-5-isoxazolone ligands has been designed, synthesized, characterized and their photophysical properties evaluated . The new heterocyclic β-diketonate complexes of Tb3+ exhibit high green luminescence efficiency in the solid state with quantum yields between 59â72%. Furthermore in this work, the synthesis, characterization and luminescent properties of poly-β-hydroxybutyrate (PHB) polymer films doped with Tb3+-3-phenyl-4-acyl-5-isoxazolonate complexes at 5, 10, 15 and 20% (mass) are reported. The fact that the luminescent efficiency of doped films is enhanced (quantum yields between 74â86%) compared with precursor samples revealed that the polymer matrix acts as a co-sensitizer for Tb3+centers. The luminescence intensity decreases, however, with increasing precursor concentration in the doped PHB to greater than 15% where a saturation effect is observed, indicating that changes in the polymer matrix improve the absorption properties of the film, consequently quenching the luminescent effect. Synthesized luminescent polymers containing Tb3+-hetrocyclic β-diketonate complexes showed promising photoluminescence efficiency for applications to polymer light-emitting diodes and active polymer optical fibers.
基于 3-苯基-4-酰基-5-
异噁唑酮
配体的一类新型高效 Tb3+ 天线配合物已被设计、合成、表征,并对其光物理性质进行了评估。新的杂环δ-二
酮酸 Tb3+ 复合物在固态下具有很高的绿色发光效率,量子产率在 59% 到 72% 之间。此外,本研究还报道了掺杂了 5%、10%、15% 和 20%(质量分数)Tb3+-3-苯基-4-酰基-5-
异恶唑啉酸盐复合物的聚δ-羟基
丁酸酯(
PHB)聚合物薄膜的合成、表征和发光特性。与前驱体样品相比,掺杂薄膜的发光效率有所提高(量子产率介于 74% 与 86% 之间),这表明聚合物基质起到了 Tb3+ 新星共敏化剂的作用。然而,随着掺杂
PHB 中前驱体浓度的增加,发光强度会降低,当浓度超过 15% 时,会出现饱和效应,这表明聚合物基质的变化改善了薄膜的吸收特性,从而熄灭了发光效应。合成的含有 Tb3+-河曲δ-二
酮酸酯复合物的发光聚合物显示出良好的光致发光效率,有望应用于聚合物发光二极管和有源聚合物光纤。