铕、铽依诺沙星配合物的合成和光谱特性

Synthesis and Spectroscopic Characterization of Complexes of Eu(Ⅲ)-Enoxacin and Tb(Ⅲ)-Enoxacin

合成了Eu3+、T b3+与依诺沙星配合物,并用元素分析法和ICP-AES法确定了配合物的组成为RE(enx)3C l3.8H2O。红外光谱表明,依诺沙星配体以羧酸根同中心离子发生螯合。紫外光谱表明,配合物的紫外吸收波长较配体稍有红移,且强度明显增强。荧光光谱表明,Eu3+配合物在592nm和612nm处出现Eu3+的特征荧光峰,分别对应5D0-7F1和5D0-7F2的能级跃迁。T b3+配合物在490nm和545nm出现T b3+的特征发射峰,且545nm处发射峰强度最大,二者分别对应5D4-7F6和5D4—7F5跃迁。

Two complexes Eu（enx）3Cl3· 8H2O and Tb（enx）3Cl3·8H2O have been synthesized. The compositions and structures of these complexes were determined with elemental analysis, ICP, IR, UV and luminesescence spectroscopy. IR spectra show that carboxy groups may coodinate the Eu^3＋or Tb^3＋to form stable complexes. The UV abstract intensity of complexes was stronger than that of lagend and the peaks of the complexs were bathochromic shifted. The strong fluorescence emitting of 592nm and 612nm for Eu^3＋in the complexes is ascribed to the transitions ^5D0-^7F1 and ^5D0-^7F2 respectively. But the characteristic emitting of 490nm and 545nm for Tb^3＋in the complexes Tb（enx）3Cl3 ·8H2O is related to the transitions ^5D4-^7F6 and ^5D4-^7F5 respectively.