对苯二甲酸铕锶、铽锶掺杂配合物的红外光谱及荧光光谱研究

Study on the Infrared and Fluorescence of Complexes of Eu-Sr,Tb-Sr with p-Phthalic Acid

采用稀土掺杂的方法合成了铕锶、铽锶的对苯二甲酸(L)配合物,并对系列配合物进行了红外光谱测定和荧光光谱研究。实验结果表明,共掺杂配合物的羧基氧与稀土离子配位。铽锶配合物T b-S r-L和铕锶配合物Eu-S r-L的发光性能较好。在上述配合物中加入荧光惰性离子Y3+形成T b-S r-Y-L和Eu-S r-Y-L配合物可以使对苯二甲酸铕锶、铽锶配合物体系的荧光得到进一步增强,这可能是由于存在有效的分子内传能,使发光稀土离子Eu3+和T b3+受到敏化作用而使荧光增强;而加入Zn2+和M n2+使体系的荧光减弱,铽锶配合物及其掺杂配合物T b-S r-Y-L是较理想的发光配合物。

In this investigation, the complexes of Eu-Sr, Tb-Sr with p-Phthalic acid have been prepared by using the method of doped other metal ions. Their IR absorption spectra and fluorescence spectra were studied. The results show that their Luminescence intensity are enhanced by co-doped y^3＋, because Y^3＋can transfer energy to Eu^3＋ and Tb^3＋. But the emission intensity of Eu^3＋ and Tb^3＋ ions are weakened by co-doped Zn^2＋ or Mn^2＋ ions. Their IR spectra show that there are some shift for the vibration of vas coo- and vs coo-, which indicated that there are influence on the molecular structure. The complex of Tb^3＋ （Tb-Sr-Y-L） is an ideal luminescence material.