Tc(VII)/Tc(V) direct coordination with secondary building unit of uranyl hybrid materials and their isolation as molecular cluster

Tc-99 oxoanion pertechnetate (TcO4-), reduced Tc species and actinides co-exist in spent nuclear fuel/legacy waste and co-extract together during reprocessing. Herein, we reported five new molecular cluster/extended structures with pentameric/tetrameric uranyl building units directly coordinated to oxoanion TcO4-/ReO4- (surrogate) and reduced technetium cation Tc(V). The isolation and characterization of these new compounds will be useful in furthuring the understanding of coordination between Tc species and actinides, which is critical for their efficient seperation/recovery.