Lanthanide Complexes (Ln=La, Nd, Dy) of Octaethyl propane‐1,1,3,3‐tetrayltetrakis(phosphonate): Multidentate Binding Competing with Monodentate DMSO Complexes

The preparation of lanthanide nitrate complexes [Ln(NO3)3{L}]n (Ln3+=La, Nd, Dy) supported by the octaethyl propane-1,1,3,3-tetrayltetrakis(phosphonate) (L) chelate ligand platform is presented. Re-crystallization these compounds from DMSO/THF led to a complete replacement multidentate phosphonate ester and formation exclusively DMSO-supported species [Ln(NO3)3(DMSO)4]. relative basicity model vs. DMSO explored with theoretical means, pointing out relevance solvation in this case line experimentally observed exchange process. optical properties dysprosium(III) derivatives are examined visible region indicating significantly higher quantum yield for its tetraphosphonic complex than coordinated analog.