Uranyl Luminescence Quenching in the Presence of Organic Reagents Based on 2,2'-Bipyridyldicarboxylic Acid

The absorption and luminescence spectra and the luminescence decay kinetics of uranyl ions (UO 2 2+ ) in the presence of organic reagents based on 2,2'-bipyridyldicarboxamides with various substituents have been studied. The quantum yields and luminescence lifetimes of uranyl nitrate hexahydrate and uranyl complexes with organic ligands in acetonitrile solutions have been determined. The mechanism of energy transfer in uranyl complexes is proposed.