Premium
New Polypodal Polycarboxylic Ligands − Complexation of Rare‐Earth Ions in Aqueous Solution
Author(s) -
Viguier Romain,
Serratrice Guy,
Dupraz Agnes,
Dupuy Claude
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200107)2001:7<1789::aid-ejic1789>3.0.co;2-c
Subject(s) - chemistry , aqueous solution , lanthanide , chelation , dysprosium , hydroxymethyl , ether , stability constants of complexes , ion , inorganic chemistry , rare earth , medicinal chemistry , organic chemistry , mineralogy
The complexation ability of new polypodal carboxylic ligands prepared from 2,2‐bis(hydroxymethyl)‐1‐alkanols was investigated in aqueous solution with Y 3+ and various lanthanide ions (La 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Tb 3+ , Dy 3+ ). The values of the stability constants for ML complexes are of the order of 10 4 for the hexadentate trioxypropionates, 10 7 for the hexadentate trioxyacetates and 10 14 for the nonadentate triaminohexaacetates. In these systems, the nitrogens of the amino groups seem to be better chelating atoms than the oxygens of the ether groups. The hydration numbers of dysprosium(III) complexes have been determined from the Dy III induced 17 O NMR water shifts.