新型对称双核β-二酮及其Eu^(3+)三元螯合物的合成及荧光性质

Synthesis, Characterization, and Fluorescence Properties of a Novel Symmetric Di-Nuclear Β-Diketonate Ligand and Its Eu^(3+) Ternary Chelate Complex

合成了一种新的基于电子给体-共轭体系-电子受体(D-π-A)结构的β-二酮配体,2,6-二(吡唑-1,5-二苯基-3-甲酰乙酰)吡啶(L),用元素分析和1HNMR谱确定了其组成.核磁和红外分析结果表明:L主要以烯醇式存在;另外用配体L作第一配体,邻菲罗啉(phen)为第二配体,与EuCl3·6H2O反应,合成了一种新型三元螯合物Eu2(L)3(phen)2.用红外光谱,紫外-可见光谱,元素分析和荧光光谱进行了表征.荧光光谱表明:配合物中有机配体能够有效地敏化稀土Eu3+离子,且发射谱线很窄,说明配合物在有机电致发光材料方面具有一定应用价值.

A novel β-diketonate ligand. 2, 6-Bis （3-methyl-1-phenyl-5-pyrazolone-4-yl） pyridine was prepared and characterized by elemental analysis and 1 H NMR spectra. The result of the 1H NMR spectroscopy showed that the ligand L existed as an enol form isomer, which was consistent with the result of IR analysis. In addition, its corresponding dinuclear Eu^3＋ complex using 1,10-phenanthroline as the second ligand was prepared and characterized by elemental analysis,IR spectra, UV-Vis spectra, and 1 H NMR. The fluorescence spectra indicates that the ligand has excellent antenna effect to sensitize the Eu^3＋ ions, and the emission spectra is very sharp and narrow, which would be considered as a valuable material in organic electroluminescent materials.