Host-guest interaction between cyclen based macrotricyclic ligands and phosphate anions. A potentiometric investigation.

The host-guest interaction between orthophosphate, pyrophosphate and triphosphate anions and three cyclen based macrotricyclic ligands possessing ortho- (TOC), meta- (TMC) and para-xylenyl (TPC) linkers was investigated by potentiometric measurements. The ternary species present in soln. and their stability consts. have been detd. The different behaviors are explained in terms of hydrogen bond formation and coulombic attraction between the org. host and the inorg. guest. The selectivity, illustrated with species distribution diagrams, is discussed. The results unambiguously showed the importance of the distance between the two cyclen cores and emphasized the increasing of the triphosphate species selectivity together with the cavity size of the ligand. A comparison of the present results with those obtained with their mono-bridged homologues is also discussed. [on SciFinder(R)]

Références

Titre
Host-guest interaction between cyclen based macrotricyclic ligands and phosphate anions. A potentiometric investigation.
Type de publication
Article de revue
Année de publication
2006
Revue
Dalt. Trans.
Pagination
3418–3426
ISSN
1477-9226
Soumis le 12 avril 2018