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将Michler′sKetone(MK)作为协同配体与一种 β 双酮类稀土配合物Eu(fod) 3的氯仿溶液混合 ,两者有效配合生成一种新的稀土配合物Eu(fod) 3MK ,它的吸收谱中有一Michler′sKetone和Eu(fod) 3都不具有的新的吸收峰 ,吸收边在 45 0nm附近。这一新的吸收峰与PVK的发射谱有很好的重叠 ,从而使能量可以有效地通过Forster能量转移方式由PVK传递给稀土配合物。将这种新的稀土配合物掺杂到导电聚合物PVK中 ,并以它们为发光层制成电致发光器件。结果表明 :加入协同配体后的配合物的光致发光和电致发光中 ,PVK的发射均被有效抑制。这说明MK的加入大大提高了由聚合物基质向稀土配合物进行能量传递的效率
Michler’sKetone (MK) as a synergistic ligand is mixed with a chloroform solution of Eu (fod) 3, a rare earth complex of β-diketone. Both of them work together to form a new rare earth complex Eu (fod) 3MK There is a new absorption peak not found in both Michler’s Ketone and Eu (fod) 3, with the absorption edge near 450 nm. This new absorption peak has a good overlap with the emission spectrum of PVK so that energy can be efficiently transferred from PVK to the rare earth complex via Forster energy transfer. This new rare earth complex is doped into the conductive polymer PVK, and they are used as the light-emitting layer electroluminescent device. The results showed that the emission of PVK in the photoluminescence and electroluminescence of the complex after the addition of the coordination ligand was effectively inhibited. This shows that the addition of MK greatly improves the efficiency of energy transfer from the polymer matrix to the rare earth complex