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Title
Japanese: 
English:Relationship between structure and coordination strength of N and N,O-hybrid donor ligands with trivalent lanthanides 
Author
Japanese: 中瀬正彦, 小林徹, 塩飽秀啓, 鈴木伸一, T.S. Grimes, B.J. Mincher, 矢板毅.  
English: Masahiko Nakase, Toru Kobayashi, Hideaki Shiwaku, Shinichi Suzuki, T.S. Grimes, B.J. Mincher, Tsuyoshi Yaita.  
Language English 
Journal/Book name
Japanese: 
English: 
Volume, Number, Page         pp. 633-646
Published date Feb. 3, 2019 
Publisher
Japanese: 
English: 
Conference name
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English: 
Conference site
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Abstract To effectively separate lanthanides (Ln(III)) from actinides (An(III)), symmetrical 2,2′-bipyridyl (Bpy), 1,10-phenanthroline (Phen), and unsymmetrical N-methyl-N-tolyl-1,10-phenanthroline-2-carboxamide (MeTol-PTA) were investigated. According to the crystal structures and EXAFS experiments, the decreasing ionic radius from light to heavy Ln led to decreases in the Ln–N (Bpy) and Ln–N (Phen) distances, while log β simply increased due to the electrostatic interaction and the order of Ln–O (MeTol-PTA) < Ln–N (Bpy, Phen) < Ln–N (MeTol-PTA) was obtained. This indicated that the bulky phenanthroline moiety of MeTol-PTA may not allow N (MeTol-PTA) to come close to Ln. Consequently, the log β of MeTol-PTA exhibited a local maximum (around Nd).

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