铕(Ⅲ)-苯甲酰丙酮-聚(甲基丙烯酸甲酯-co-4-乙烯基吡啶)高分子配合物的合成与光致发光性能

Synthesis and Luminescence Properties of a Eu(Ⅲ) Complex with Benzoylacetone and Poly(methyl methacrylate-co-4-vinyl pyridine)

先制备4-乙烯基吡啶(4-VP)与甲基丙烯酸甲酯(MMA)的共聚物(PMMAVP),并以此为大分子配体,进一步与苯甲酰丙酮的二元铕配合物Eu(BA)3(H2O)2反应,合成了键合型的稀土高分子配合物Eu(BA)3(PMMAVP).通过元素分析、IR、1HNMR对配合物的结构进行了表征,研究了配合物的光致发光性能.结果表明:共聚物PMMAVP中的4-乙烯基吡啶单元可通过吡啶环上的氮原子与稀土离子配位;在紫外光激发下,配合物Eu(BA)3(PMMAVP)发射Eu^3+离子的特征荧光;与二元配合物Eu(BA)3(H2O)2相比,Eu(BA)3(PMMAVP)具有更为优异的荧光性能,其在611nm处的荧光强度是Eu(BA)3(H2O)2的2.2倍.

The copolymer(PMMAVP)of 4-vinyl pyridine(4-VP)and methyl methacrylate(MMA)was first prepared and then used as a macromolecular ligand to react with Eu(BA)3(H2O)2,the binary europium complex of benzoylacetone,to synthesize the bonding-type rare earth polymer complex Eu(BA)3(PMMAVP).The complex was characterized by element analysis,IR,1H NMR and luminescence spectra.The results showed that 4-vinyl-pyridine unit in copolymer PMMAVP could coordinate with rare earth ions through nitrogen atoms on pyridine ring.Under ultraviolet excitation,the complex Eu(BA)3(PMMAVP)emitted the characteristic luminescence of Eu^3+ions.Compared with the binary complex Eu(BA)3(H2O)2,Eu(BA)3(PMMAVP)had better luminescence performance,and its luminescence intensity at 611 nm was 2.2 times that of Eu(BA)3(H2O)2.