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本文系统地研究了Pr~(3+)、Nd~(3+)、Sm~(3+)、Eu~(3+)、Dy~(3+)、Ho~(3+)、Er~(3+) 及Tm~(3+)八种离子在乙醇介质中与乙酰丙酮(AA)、苯甲酰丙酮(BA)、二苯甲酰甲烷(DBM)及噻吩甲酰三氟丙酮(TTA)等β-二酮形成的二元配合物及由它们与二苯胍(DPG)、1,10-邻菲咯啉(pben)所形成的三元配合物在可见光区的吸收光谱和高阶导数吸收光谱。结果表明,以导数吸收光谱研究f-f跃迁具有较高的灵敏度和分辨率。确定了两类三元配合物的组成为Ln~(3+):β-二酮:DPG=1:4:1,Ln~(3+):β-二酮:phen=1:3:1,根据吸收峰的位移,计算了配合物的共价参数。指出混配配合物具有明显的共价性。比较了配合物的稳定性与原子序数之间的关系,观察到了明显的双峰效应。
In this paper, the effects of Pr ~ (3 +), Nd ~ (3 +), Sm ~ (3 +), Eu ~ (3 +), Dy ~ (3 +), Ho ~ (3 +), Er ~ (AA), benzoylacetone (BA), dibenzoylmethane (DBM) and thiophanoyl trifluoroacetone (TTA) in ethanol medium were studied. Etc., and the ternary complex formed by them with diphenylguanidine (DPG) and 1,10-phenanthroline (pben) in the visible region and the higher order derivatives Absorption spectrum. The results show that the derivative absorption spectrum of f-f transition with high sensitivity and resolution. The composition of the two ternary complexes was determined to be Ln ~ (3 +): β-diketone: DPG = 1: 4: 1, Ln ~ (3 + According to the shift of the absorption peak, the covalent parameter of the complex was calculated. It is pointed out that there are obvious covalences in the compounding complexes. The relationship between the stability of the complex and the atomic number was compared and a distinct bimodal effect was observed.