T. Kobayashi, Shin'ichi Suzuki, H. Shiwaku, T. Yaita
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引用次数: 4
Abstract
The complexation properties of N-alkyl-N-phenyl-1,10-phenanthroline-2-carboxamide (PTA) with trivalent lanthanides (Ln) were investigated based on structural analysis by using X-ray crystallography and extended X-ray absorption fine structure (EXAFS) methods. As a result, it is revealed that two PTA molecules coordinate with Ln as tridentate ligand via two nitrogen in phenanthroline moiety and one oxygen in amide moiety in both crystal and solution states. The slight difference in coordination bond distances are observed between Eu and Nd complexes, this difference corresponds to the difference in ionic radius between Nd and Eu. This result indicates slight difference in ionic radii of Ln hardly affects coordination properties of PTA.
采用x射线晶体学和扩展x射线吸收精细结构(EXAFS)方法研究了n -烷基- n -苯基-1,10-菲罗啉-2-carboxamide (PTA)与三价镧系元素(Ln)的络合性能。结果表明，在晶体状态和溶液状态下，两个PTA分子通过邻菲罗啉部分的两个氮和酰胺部分的一个氧与Ln作为三齿配体进行配位。Eu和Nd配合物的配位键距离有细微差异，这种差异对应于Nd和Eu之间离子半径的差异。结果表明，Ln离子半径的微小差异对PTA的配位性能影响不大。
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