Another Uranophile Sodium Hydroxycalix(8)arene-p-sulfonate: Its Acid Dissociation and Divalent Metal Ion Binding Properties.
-
- SONODA Miwako
- Department of Industrial Chemistry, Kumamoto Institute of Technology
-
- HAYASHI Kenji
- Tzurumisoda Co.
-
- NISHIDA Masashi
- Department of Industrial Chemistry, Kumamoto Institute of Technology
-
- ISHII Daido
- Department of Industrial Chemistry, Kumamoto Institute of Technology
-
- YOSHIDA Isao
- Department of Industrial Chemistry, Kumamoto Institute of Technology
Bibliographic Information
- Other Title
-
- Another Uranophile Sodium Hydroxycalix
Search this article
Description
Acid dissociation constants of the hydroxyl groups of sodium hydroxycalix[8]arene-p-sulfonate (18=Na8H4L) were measured by the pH titration method in an aqueous solution. The acid dissociation constants determined were as follows: pKa1=3.73±0.05, pKa2=4.39±0.05, pKa3=8.07±0.02, pKa4=10.1±0.1 under the conditions of μ=0.1 with KNO3 and 25°C. Furthermore, the complex formation reactions of 18 with some divalent metal ions such as Mg2+, Ca2+, Mn2+, Co2+, Ni2+, Cu2+, Zn2+, and UO22+ (M2+) were investigated by the pH titration method in aqueous solutions and the stability constants of the complexes were evaluated. No complex formation was observed for Cu2+. The slight formation of complexes having a 1:1 molar ratio (M2+:18) was observed for all other divalent metal ions except for UO22+. In contrast, UO22+ formed a relatively stable 2:1 complex in addition to an unstable 1:1 complex. These results indicate that 18 is a highly selective metal ligand for UO22+ among the various divalent metal ions.
Journal
-
- Analytical Sciences
-
Analytical Sciences 14 (3), 493-499, 1998
The Japan Society for Analytical Chemistry
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390282679230367616
-
- NII Article ID
- 130004439846
- 10002415719
-
- NII Book ID
- AA10500785
-
- COI
- 1:CAS:528:DyaK1cXjvFKktL0%3D
-
- ISSN
- 13482246
- 09106340
-
- NDL BIB ID
- 4514229
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed