多色彩可控稀土配合物粉体的制备

Fabrication of multi-color controllable rare earth complexes

以双酚A(BPA)为第一配体,1,10-菲啰啉(phen)为第二配体制备了Eu(BPA)3phen和Tb(BPA)3phen两种配合物粉体,通过不同比例共混获得多色彩可控光致发光稀土配合物。采用扫描电子显微镜(SEM)、傅里叶红外光谱仪(FT-IR)、热重分析仪(TG-DSC)和荧光光谱仪对所制备的复合粉体进行表征。结果表明,所制备粉体呈规则几何形状;配合物的热稳定性较好,初始分解温度为334℃,分解后的产物为稳定的氧化物(Eu2O3和Tb2O3);荧光光谱表明Eu(BPA)3phen和Tb(BPA)3phen分别发射明亮的红色和绿色特征荧光;在290 nm单一波长紫外光的激发下,复合配合物粉体依据铕和铽的比例不同发射出由红至黄再到绿色过渡的多种色彩的荧光。

Two complexes of Eu(BPA)3phen and Tb(BPA)3phen were prepared with bisphenol A(BPA) as the first ligand and 1,10-phenanthroline(phen) as the second ligand. Multi-color controllable photoluminescence rare earth complexes were obtained by blending the two powders with different proportions.The prepared composite powders were characterized by SEM, FT-IR, TG-DSC and fluorescence spectrometer. The results showed that the prepared powder had regular geometric shape. With good thermal stability, the initial decomposition temperature of the complexes was 334 ℃ and the products after decomposition were stable oxides(Eu2O3 and Tb2O3). The fluorescence spectra showed that Eu(BPA)3phen and Tb(BPA)3phen emit strong red and green characteristic fluorescence. The physically mixed Eu(BPA)3phen and Tb(BPA)3phen composites emit a variety of colors from red to yellow and green according to the ratio of europium and terbium, under excitation of single wavelength UV light at 290 nm.