Rare-earth amidate coordination compounds
AssigneeE. I. Du Pont de Nemours and Company
InventorDamien F. Reardon
Life of this patent
Estimating the term…
Abstract
The invention is directed to a lanthamide chelate composition having a lanthamide, a charged amidate ligand, and a mono- or bidentate neutrally charged coordination compound, the composition being represented by structure I or structure II wherein Ln3+ designates lanthamide, R1 is alkyl, aryl, or heteroaryl; R2 is alkyl, aminoalkyl, aryl or heteroaryl; M is a neutrally charged monodentate coordination compound, M′ is a neutrally charged bidentate coordination compound, a=1 or 2; and wherein M and M′ comprise N, S, or O. It extends to the process of making the composition.
Claims10
A process comprising combining in an organic solvent a lanthanide ester and a compound represented by the formula
- wherein R1 is heteroaryl;
- R2 is aminoalkyl;
- resulting in a solution of tris-amidato-lanthanide chelate represented by structure III
- wherein Ln3+ designates lanthanide, R1 is heteroaryl;
- R2 is aminoalkyl;
- and, addition of a neutrally charged coordinating ligand to the solution of tris-amidato-lanthanide chelate providing a lanthanide chelate represented by structure I or structure II as shown below:
- wherein Ln3+ designates lanthanide, R1 is heteroaryl;
- R2 is aminoalkyl;
- M is tri-phenyl phosphine oxide, M′ is 1,10-phenanthroline, a=1 or 2;
- and the neutrally charged coordinating ligand is tri-phenyl phosphine oxide or 1,10-phenanthroline.
Dependencies are inferred from the claim text.