Review Article
Application of Calixarenes as Macrocyclic Ligands for Uranium(VI): A Review
Table 2
Stability constants (
) for the complexes of
and calixarene derivatives at 25°C.
| Entry | Extraction agent | | Medium | pH | Reference |
| 1 | 1
b | 17.7 | carbonate buffer | 10.4 | [49] | 2 | 2 | 18.9 | 10−2 M carbonate | 10.4 | [50] | 3 | 3 | 19.2 | 10−2 M carbonate | 10.4 | [50] | 4 | 4 | 3.2 | 10−2 M carbonate | 6.5 | [50] | 5 | 5 | 18.4 | 10−2 M carbonate | 10.4 | [50] | 6 | 6 | 18.7 | 10−2 M carbonate | 10.4 | [50] | 7 | 7 | 3.1 | 10−2 M carbonate | 6.5 | [50] | 8 | 8 | 18.7 ( | carbonate buffer | 10.4 |
[49] | 18.1 ( | 9 | 9 | 3.2 | 10−2 M carbonate | 6.5 | [50] | 10 | 10 | 16.3 | 10−2 M carbonate | 10.4 | [51] | 11 | 10 | 17.5 | 10−2 M carbonate | 11.5 | [51] | 12 | 11 | 2.7 | methanol | — | [52] | 13 | 11 | 3.72 | acetonitrile | — | [52] | 14 | 12 | 3.26 | methanol | — | [52] | 15 | 12 | 3.6 | acetonitrile | — | [52] | 16 | 13 | 9.93 | methanol | — | [53] | 17 | 14 | 14.2 | methanol | — | [54] |
|
|
a.
bnon-cyclic extractant 1.
c.
|