Synthesis and spectral studies of macrocyclic mono- and binuclear gadolinium(III)complexes derived from schiffs bases

Abstract

A series of mono- and binuclear Gadolinium(III) macrocyclic complexes have been prepared by the condensation of schiff's bases with the precursor compound 4,4'-dimethyl(2,2' -diformyl-6,6' -piperazine-1,4-di-ylmethylene) bis phenol in template method. All the binuclear complexes 'have been prepared <i>in situ </i>from their corresponding mononuclear complexes without isolation. The phenolate oxygen atom of the binucleating ligands behaves as a bridging group between two metals. The complexes have been characterized by elemental analysis, IR, NMR, UV spectra. The ESR spectral study was carried out for some complexes. The results of elemental analysis of the complexes are in good agreement with the theoretical value. Conductivity studies reveal that all the complexes are neutral.