Spectral Characterization of Sm (III)- Antibiotic Complexes in Solution

The spectral study of Sm (III)-antibiotic complexes is carried out in 50% DMSO- water solvent. The ligands included five antibiotics (Ceftizoxime, Pipercillin, Cefuroxime, Cefotaxime and Cefazolin). The effect of the ligand environment on electronic spectra of the metal ion with special reference to complexation and nature of metal-ligand bond has been investigated. Various intensity parameters [Oscillator strength (P), Judd-Ofelt parameter (Tλ)] have been evaluated for different metal ligand stoichiometries.