Front Cover: Complexation of ThoriumIV with Fluorinated Heterocyclic β-Diketones in Aqueous Hydrochloric Solutions (Eur. J. Inorg. Chem. 26/2024)

Perfluorinated β-diketones form chelation complexes with rare earth and transition metals. Six heterocyclic dicarbonyl ligands demonstrate chelation activity toward Th^IV at acidic pH in aqueous solution. The “true” stability constants lie in the range 6.2–6.8 logarithmic units and are much greater than for lanthanide complexes. A significant bathochromic shift between the maximum absorption wavelength of lanthanide and actinide monocomplexes of β-diketones was detected. The spectral shift increases with the atomic number of the substituted chalcogen atom in the heterocyclic ring of the corresponding ligand. More information can be found in the Research Article by M. A. Lutoshkin and co-workers.