18153-67-8Relevant academic research and scientific papers
Proton nuclear magnetic resonance studies of the 8-quinolinol complexes of thorium(IV) and uranium(VI)
Baker, Blair C.,Sawyer, Donald T.
, p. 1160 - 1164 (1969)
The proton nmr spectra of the 8-quinolinol (oxine, HOx) complexes of thorium(IV) and uranium(VI) in DMSO solutions have been recorded and analyzed. The data establish that the solvated complexes of thorium and uranium, ThOx4· HOx and UO2Ox2·HOx, only exist in the solid phase and dissociate to ThOx4 and UO2Ox2 in solution. The oxines in the latter complexes are equivalent on the basis of the nmr data. Studies of the UO2Ox3- complex also confirm that the three oxines are equivalent. Drying studies and differential thermograms of the various solvated oxine complexes of thorium and uranium have been used to characterize the solid species. The red form of UO2Ox2·HOx has a much greater thermal stability than the orange form and can be dried to constant weight at 150°. The maroon hydrate, UO2Ox2·3H2O, also is stable up to 150°.
Properties and infrared spectra in the potassium bromide region of 8-quinolinol and its metal chelates
Tackett, James E.,Sawyer, Donald T.
, p. 692 - 696 (2008/10/08)
The infrared absorption spectra in the 11-25 μ region of 8-quinolinol and the 8-quinolinol chelates of the alkaline earth ions, manganese(II), cobalt(II), nickel(II), copper(II), zinc(II), cadmium(II), lead(II), aluminum(III), iron(III), thorium(IV), and uranium(Vl) have been recorded and band assignments have been made. A consideration of the spectral shifts has been used to study the structures of the divalent metal chelates in the solid phase. The spectral data indicate that the divalent ions which have available d-orbitals bond differently with 8-quinolinol from those without available d-orbitals. The solvate oxine in the thorium(IV) and uranium(VI) chelates is not distinguishable from the ligand oxines on the basis of the infrared data. Structures for the a and β forms of copper oxinate are proposed.
