稀土与甘氨酰替-L-亮氨酸配合物XPS研究

XPS Study on Ianthanide Complexes With Glycyl-L-leucine

由浓缩等摩尔稀土氯化物和甘氨酰替-L-亮氨酸水溶液制备了稀土与甘氨酰替-L-亮氨酸固体配合物。配合物组成为LnLCl_3·nH_2O(式中,L=甘氨酰替-L-亮氨酸;n=5,Ln=Eu;n=6,Ln=Tb,Ho和Tm)。用X射线光电子能谱研究了稀土与甘氨酰替-L-亮氨酸的配位作用。结果表明稀土与甘氨酰替-L-亮氨酸配合物中一些相关原子的电子结合能明显改变,并且发现铕配合物Eu_(3d),谱峰有强的伴峰,对上述伴峰产生机理亦进行了讨论。

The title complexes have been prepared by concentrating stoichiometric mixture (1:1) of lanthanide chloride and glycyl-L-leucine solution, and studied by XPS. The binding energy of O_(1s), C_(2p), Ln_(3d), and Ln_(4d) changed because of coordination. Moreover satellite peaks arise in the spectra of Eu complex. The formation of satellite peak has been attributed to electron transfer.