| Titre : | Affinity of polymer-supported reagents for lanthanides as a function of donor atom polarizability (2009) |
| Auteurs : | Yijia Yang, Auteur ; Spiro D. Alexandratos, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 13, Juillet 2009) |
| Article en page(s) : | pp. 6173–6187 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | Lanthanide-ion affinities Donor atoms Polymer-supported reagents |
| Résumé : | This review correlates lanthanide-ion affinities with the polarizability of the donor atoms on immobilized ligands to gain an insight into the design of lanthanide-selective polymer-supported reagents. Comparison with the affinities for actinide ions clarifies the correlation. Polymers with different ligands are classified into four categories, based on an increasing order of donor atom polarizability: oxygen, oxygen and nitrogen, nitrogen, and sulfur. Hard−soft acid−base theory is an important determinant of ion−ligand affinities. Additional factors that affect complexation levels include counterion coordination to the metal, protonation of the ligand, and hydration. Selectivity for the lanthanide ions may be engineered into polymer-supported reagents by introducing phosphonic acid ligands. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie900074t |
