Cation binding properties by ligands deriving from p-tert-butylcalix[4]arene O-substituted by diethyl malonate functions
Baklouti, L; Abidi, R; Vicens, J; Asfari, Z; Harrowfield, J; Rokbani, R
| HERO ID | 4936127 |
|---|---|
| In Press | No |
| Year | 2002 |
| Title | Cation binding properties by ligands deriving from p-tert-butylcalix[4]arene O-substituted by diethyl malonate functions |
| Authors | Baklouti, L; Abidi, R; Vicens, J; Asfari, Z; Harrowfield, J; Rokbani, R |
| Journal | Journal of Inclusion Phenomena and Macrocyclic Chemistry |
| Volume | 42 |
| Issue | 3-4 |
| Page Numbers | 197-201 |
| Abstract | The complexing properties of four dimalonate and one diester calix[4]arene derivatives toward alkali and alkaline earth cations have been investigated in acetonitrile by means of UV spectrophotometry. Mononuclear complexes have been detected for all the complexes except in the case of ligands 4 and 5 with Na+ and Ca2+ where a biligand species (ML2) is present. This later stoichiometry was also confirmed by H-1-NMR and FAB(+) MS methods. In the case of ligand 3 and Sr2+ we observed the formation of both mono and binuclear species (ML, (ML)-L-2). Particular selectivities have to be noted from the unique complexation of Na+ and Ba2+ by ligand 2 and Rb+ by ligand 3 toward the two series of cations. The complexation is predominantly dependent on the bulkiness of the cavity and the cation size. |
| Wosid | WOS:000176386800005 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | alkali and alkaline-earth cations; calix[4]arene; malonate; stability constants |