共价有机多孔稀土杂化材料的制备与性能

Preparation and Properties of Covalent Organic Porous Rare-Earth Hybrid Materials

以结构规整、密度低、热稳定性良好的共价有机多孔骨架(COF-SDU1)为基质,根据配位化学原理,将稀土β-二酮类铕配合物Eu(TTA)_3-Phen引入到该多孔基质中,得到稀土杂化材料(Eu(TTA)_3Phen-@COF-SDU1)。对合成材料的结构进行傅里叶变换红外光谱(FT-IR),紫外-可见光谱(UV-Vis)和N2吸附-脱附(BET)分析,结果表明,稀土杂化材料具有与COF-SDU1基质类似的IV型吸附-脱附特征曲线。热重分析表明,COF-SDU1作为良好的基质,能够显著改善稀土配合物的热稳定性。荧光性能分析表明,COF-SDU1基质不影响稀土与配体之间的能量传递。稀土杂化材料的荧光寿命相比于稀土配合物有明显提高。

Based on principle of coordination chemistry,the rare-earth hybrid material(Eu(TTA)3Phen-@COF-SDU1)was obtained by using rare-earthβ-diketonate complex(Eu(TTA)3Phen)introducing to the covalent organic porous framework(COF-SDU1)matrix with ordered structure,low density and good thermal stability.The structural analysis of the composite was characterized by FT-IR,UV-Vis and BET.The result shows that the rare earth hybrid material has similar IV-type adsorption-desorption characteristics as the COF-SDU1 matrix.Thermogravimetric test results indicate that COF-SDU1 is a good matrix which can significantly improve the thermal stability of the rare-earth complexes.The fluorescence properties demonstrate that the matrix does not influence the energy transfer between the rare-earth and the ligand.The fluorescence lifetime of rare earth hybrid materials is significantly higher than that of rare earth complexes.