Citation: Guo Qiang SHANGGUAN, Jun ZH U, Ning WANG, Jia Zuan NI. The Study on the Stability Constant and Species Distribution of Eu (Ⅲ) and Tb (Ⅲ) Complexes with BDBPH[J]. Chinese Chemical Letters, ;2005, 16(12): 1671-1674. shu

The Study on the Stability Constant and Species Distribution of Eu (Ⅲ) and Tb (Ⅲ) Complexes with BDBPH

1.
Department of Chemistry, Jining Medical College, Jining 272013;
2.
Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
3.
Graduate School of Chinese Academy of Sciences, Beijing 100039

Received Date: 7 March 2005

The stability constants and species distributions of complexes of two lanthanide ions,Eu(Ⅲ) and Tb(Ⅲ), with a macrocyclic ligand, BDBPH, in 1:1 and 2:1 system, were determined potentiometrically at 25.0℃ and Ⅰ=0.100 mol L^-1. The two metal ions could form deprotonated mono-or dinuclear complexes with BDBPH after the first two protons of the ligand completely neutralized. At higher pH values, Eu(Ⅲ) could not form hydroxy complexes with BDBPH, while Tb(Ⅲ) could form hydroxy complexes in the type of M₂L(OH), M₂L(OH)₂, and M₂L(OH)₃.
- BDBPH,
- Eu(Ⅲ),
- Tb(Ⅲ),
- stability constant,
- species distribution
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