Abstract
Several new peroxo complexes of U(VI) have been synthesized and characterized by element analyses and various physico-chemical techniques. A number of organic and amine ligands were used to form the complexes having compositions, [UO(O2)amH2L], where, [amH=amino acids, such as glycine, phenylalanine, leucine ; L= ligands such as pyridine, 2-picoline, 4-picoline, quinoline, iso-quinoline. The analytical data are in good agreement with the proposed empirical formulae of the U(VI) complexes. The molar conductance values indicate all the complexes of U(VI) are non-electrolyte in DMF revealing that the anions are covalently bonded in all the cases. The disappearance of the v(O-H) mode observed in the free amino acid molecule clearly indicate the loss of protons from O-H group coordination, revealing that acids are dinegative bidentate ligand coordinating through the carboxylate anion. The characteristic v1(O-O) mode of the complexes appeared in the region 842-916 cm-1, indicating that the dioxygen moieties are bonded on “side–on” fashion with the U(VI). The magnetic moment values indicated that these complexes were diamagnetic in nature suggesting no changes in the oxidation states of the metal ions upon complexation. These data also consistent with eight fold coordination of U(VI). The electronic spectral data of the complexes showed bands in between 315-380 nm due to the charge transfer band only.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call