| Autor: | N. Takuwa, M. Arisaka, H. Suganuma |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Chemistry
Health Toxicology and Mutagenesis Coordination number Inorganic chemistry Public Health Environmental and Occupational Health Analytical chemistry Ionic bonding Dielectric Mole fraction Pollution Analytical Chemistry Solvent chemistry.chemical_compound Mixed systems Nuclear Energy and Engineering Inflection point Radiology Nuclear Medicine and imaging Methanol Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 245:469-473 |
| ISSN: | 0236-5731 |
| Popis: | The stability constants (β1(F)) of the monofluoro complex of Lu(III) and those (β1(Cl)) of the monochloride solvent-shared ion-pair of Lu(III) have been determined in mixed solvents of methanol and water at 0.10 and 1.00 mol·dm−3 ionic strengths, respectively. The variation in lnβ1(F) with an increase in the mole fraction of methanol (X s) in the mixed solvent system showed an acute-angled convex inflection point at X s ≈ 0.12, an acute-angled concave inflection point at X s ≈ 0.22, and another acute-angled convex inflection point at X s ≈ 0.27. It was concluded that the first and the second convex inflection points denoted the CN of Lu3+ from CN = 8 to a mixture of CN = 8 and 7 and from CN = 8 and 7 to a mixture containing CN = 6, respectively. The concave point is the starting point of a change in the CN of Lu(III) in LuF2+ from CN = 8 to a mixture of CN = 8 and 7. The values of two inflection points of the CN around Lu3+ are consistent with the inflection points of the variation in the values of lnβ1(Cl) versus the dielectric constant of the mixed solvent. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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