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本文用X射线光电子能谱(XPS)观察到镧系离子的性质在二苯基羟乙酸配合物中与镧系原子性质的递变规律相似,而不同于其离子性质的递变规律。镧系离子在配合物中与二苯基羟乙酸羧基中的羟基氧原子成离子键,与α-羟基氧原子则成共价配键。此外,“镧系收缩”与镧系离子各轨道能级中电子结合能的变化规律有关。
X-ray photoelectron spectroscopy (XPS) shows that the properties of lanthanide ions are similar to those of lanthanide atoms in diphenylglycolic acid complexes, but different from the regularity of their ionic properties. Lanthanide ions in the complex with diphenylacetoxy carboxyl hydroxyl oxygen atom ion bond, and α-hydroxy oxygen atoms are covalent bond. In addition, the “lanthanide shrinkage” is related to the variation of the electron binding energy in each orbital energy level of lanthanide ions.