Two Beta‐Phosphorylamide Compounds as Ligands for Sm3+, Eu3+, and Tb3+: X‐ray crystallography and luminescence properties

Abstract

This paper describes the synthesis of two beta‐phosphorylamide ligands and their coordination chemistry with the Ln ions Tb3+, Eu3+, and Sm3+. Both the ligands and Ln complexes were characterized by IR, NMR, MS, and X‐ray crystallography. The luminescence properties of the Tb3+ and Eu3+ complexes were also characterized, including the acquisition of lifetime decay curves. In the solid state, the Tb3+ and Sm3+ ligand complexes were found to have a 2:2 stoichiometry when analyzed by X‐ray diffraction. In these structures, the Ln ion was bound by both oxygen atoms of each beta‐phosphorylamide moiety of the ligands. The Tb3+ and Eu3+ complexes were modestly emissive as solutions in acetonitrile, with lifetime values that fell within typical ranges.