铕铽配合物／甲基丙烯酸酯型聚合物复合材料的制备及表征

Preparation and characterization of composites of Eu-Tb complex/methacrylate-type polymer

采用原位合成法制备了一系列不同铕铽比例的稀土配合物/甲基丙烯酸酯型聚合物复合材料。利用红外光谱、SEM图像、紫外-可见吸收光谱和光致发光光谱表征了材料的结构、微观形貌、光学带隙及发光性能。结果表明,铕铽稀土配合物/甲基丙烯酸酯型聚合物复合材料在365nm紫外光激发下,均能产生发光峰在613nm附近的红光发射,发光亮度高,色纯度高,且发光强度与共聚物中MAA的含量有关;Tb3+对Eu3+荧光性能的影响与Tb3+所占比例有关,即当Tb3+比例较小时,对Eu3+产生荧光猝灭作用,当Tb3+比例较大时,对Eu3+产生荧光敏化作用。

In this paper, a series of composites of Eu-Tb rare-earth complex/methacrylate-type polymer, namely EuxTb1-x （TTA） （Phen）-P（MMA-co-MAA） （x = 1,0.75,0. 5,0.25,0）, were prepared with different ratios of Tb^3＋ by in-situ synthesis. The structure and microscopic morphology of EuxTb1-x（TTA）（Phen）-P（MMA-co- MAA） were characterized by FT-IR spectra and SEM images. The optical gap and photoluminescent properties were investigated by UV-vis absorption spectra and photoluminescent spectra. The results indicated that EuxTb1-x（TTA） （Phen）-P（MMA-co-MAA） could emit mostly characteristic fluorescence of europium ion and intense red fluorescence with peak wavelength at 613nm under UV excitation at 365nm. Photoluminescent intensity of them was found to be influenced with the content of MAA and Tb^3＋. It was demonstrated that EuxTb1-x （TTA）（Phen）-P（MMA-co-MAA） were excellent red photoluminescent composites of rare-earth complex/methaerylate-type polymer.