| Autor: | Yu-Ran Luo, Robert H. Byrne |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Lanthanide
Rare-earth element Inorganic chemistry Biophysics Analytical chemistry chemistry.chemical_element Yttrium Sodium perchlorate Biochemistry Chloride Ion chemistry.chemical_compound chemistry Stability constants of complexes Ionic strength medicine Physical and Theoretical Chemistry Molecular Biology medicine.drug |
| Zdroj: | Journal of Solution Chemistry. 30:837-845 |
| ISSN: | 0095-9782 |
| DOI: | 10.1023/a:1012292417793 |
| Popis: | Formation constants for yttrium and rare earth element (YREE) chloride complexation have been measured at 25°C by examining the influence of medium (NaClO4 and NaCl) on YREE complexation by fluoride ions and methyliminodiacetate (MIDA). YREE chloride complexation constants Clβ1(M) obtained in this work using dissimilar procedures are in good agreement and indicate that, at constant temperature and ionic strength, Clβ1(M) does not vary significantly across the fifteen-member series of elements. The ionic strength μ dependence of YREE chloride formation constants between 0 and 6 molar ionic strength can be written, for all YREE, as $${\text{log}}_{{\text{CI}}} \beta _1 \left( M \right) = \log _{{\text{CI}}} \beta _1^0 \left( M \right) - 3.066\mu ^{0.5} /\left( {1 + 1.727\mu ^{0.5} } \right)$$ where Clβ1(M) = [MCl2+][M3+]−1[Cl−1]−1 and logClβ1 o(M) represents the MCl2+ formation constant for all YREE at zero ionic strength: logClβ1 o = 0.65 ± 0.05. |
| Databáze: | OpenAIRE |
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