Cu(Ⅱ),Eu(Ⅲ)单核、双核隔室配合物的XPS研究

XPS Study of the Mononuclear and Binuclear Compartmental Complexes of [ Copper (II) and Europium (III) ]

用X射线光电子能谱(XPS)研究了Cu(Ⅱ),Eu(Ⅲ)和配体6,11-二甲基-7,10-二氮杂十六-5,11-二烯-2,4,13,15-四酮(H_4daaen)形成的单核、双核隔室配合物的电子结构和成键特性;观察到配体分子中有明显的电荷转移现象;并对Cu2p_3/2伴峰现象进行了分析.

The electronic structrure and bond properties of the compartmental ligand 6,11-dimethyl-7, 10-diazahexadeca-5, 11-diene-2, 4, 13, 15-tetraone (H4daaen) and its mononuclear and binuclear compartmental complexes of [ copper ( II ) and europium ( III ) ] have been investigated by X-ray photoelectron spectroscopy(XPS). The changes of binding energy indicate the existence of distinct charge transfer phenomena in ligand molecules after the ligands forming the mononuclear complexes. The chargetransfers from oxygen atoms to nitrogen atoms via π-bond in the ligand molecule when Cu ( II ) ion is coordinated and from nitrogen atoms to oxygen atoms when Eu( III ) ion is coordinated. After the Cu( II ) ion and Eu (III) ion are both coodinated, the charge transfer phenomenon is not obvious. The 2p3/2 satellite phenomenon of Cu( II ) is too complex to be explained by a single final-state screening theory.