Synthesis And Characterization Of Rare Earth Metal Chelates Of 1'-Heptylferrocenylhydroxamic Acid

Transitional and rare earth metal complexes have been studied widely, but rare earth complexes of 1'- heptylferrocenylhydroxamic acid have not been reported. In view of extensive usage of ferrocene derivatives and rare earth metal complexes, we have prepared 1'- heptylferrocenylhydroxamic acid and fourteen new rare earth metal chelates of it. The ligand and all of the chelates have been characterized by elemental analysis, thermal(DTA-TG) analysis, IR spectra, UV spectra and solid fluorescence spectra.All of the chelates are orange solid, except the CeL₃·H₂O(Black), and stable in the air for a long time. Element analysis and thermal analysis have proven that the general formula of these chelates is as follow: (C₇H₁₅FcCONHO)₃·Ln·xH₂O (Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, x= 1～6). By analyzing the IR spectra, ¹HNMR spectra and UV spectra, we can confirm that all the chelates are formed by [O,O] five-membered ring chelating coordination.