POSS功能化镧系稀土配合物杂化材料的制备与表征

Synthesis and Characteration of POSS Functionalized Lanthanide Rear Earth Complexes Hybrid Material

选用三羟基多面体低聚倍半硅氧烷(POSS-OH)为基质,三乙氧基硅基丙基异氰酸酯(TEPIC)为偶联剂,通过化学键合的方法将POSS与β-二酮类有机配体乙酰丙酮相结合,再以配位的形式引入稀土铽离子,制备了一种新型POSS功能化的稀土有机-无机杂化材料Tb(POSSACAC)_3。利用红外光谱和紫外光谱确定了Tb(POSS-ACAC)_3的结构,并通过与稀土小分子配合物Tb(ACAC)_3的热重分析对比发现,POSS基团的引入能够提高材料的热稳定性。进一步对材料的荧光性能进行分析,结果表明,Tb(POSS-ACAC)_3的发光纯度和荧光强度较纯配合物都有明显提高,同时解决了荧光淬灭问题。

POSS functionalized rare-earth organic-inorganic hybrid material Tb（POSS-ACAC）3 was prepared by linking the Tb^（3＋）complexes to the functionalized hydroxy polyhedral oligomeric silsesquioxane（POSS-OH）with the triethoxysilyl propyl isocyanate（TEPIC）as coupling agent through the process of chemical bonding between POSS and theβ-diketone ligand ACAC.The structure of Tb（POSS-ACAC）3 was well characterized by IR and UV spectra.Compared with pure Tb（ACAC）3 complexes,it was showed that the introduction of POSS group could improve the thermal stability of the material.Furthermore,the luminescence properties of the resulting material was characterized in detail,and the results revealed that the luminescence intensity and purity of Tb（POSS-ACAC）3 were significantly improved.In addition,the problem of fluorescence quenching was solved.