Ferrocene And Its Derivatives Of Rare Earth Complexes Synthesis And Performance Research

Reactions of LnCl3·4THF (THF = tetrahydrofuran) with Li₂Fc·TMEDA (Fc = 1,1'-ferrocenylene, TMEDA = tetramethylethylenediamine) in THF yielded a series of ferrocenyl lanthanide(III) complexes I-VI under nitrogen using standard Schlenk techniques in this paper. These complexes were characterized by melting point, IR spectrum and element analysis, and their structures can be described as [Li₃(THF)₆][(THF)Ln(Fc)₃] (Ln = Pr (I), Sm (II), Eu (III), Gd (IV), Dy (V), Er (VI)). Each Ln(III) ion is in a seven coordination geometry bounded by three 1,1'-ferrocenylene and one THF molecule.Meanwhile, six new ferrocenylcarboxylic acid (L1) lanthanide(III) complexes VII-XII: [Ln₂(μ₂-η²-OOCFc)₂(OOCFc)₄(H₂O)₄] (Ln = La (VII), Sm (VIII), Eu (IX), Tb (X), Dy (XI), Lu (XII)) have been synthesized and characterized by IR, UV-vis, element analysis and TG analysis. In these complexes, two Ln(III) ions are bridged by two ferrocenylcarboxylate anions as asymmetrically bridging ligands, leading to dimetric cores. Each Ln(III) has a coordination environment with nine coordinated oxygen atoms derived from the ferrcenylcarboxylate ligands and coordinated solvent molecules.