Giant Ln_(30)-Cluster-Embedded Polyoxotungstate Nanoclusters with Exceptional Proton-Conducting and Luminescent Properties

Although the synthesis of giant lanthanide(Ln)-containing polyoxotungstates(POTs)has long been actively pursued,it remains challenging to encapsulate high-nuclearity Ln–O clusters in POT shells because of the highly complicated assembly process.This work demonstrates a simple synthetic strategy of using lacunary POT precursors to assemble with in situ generated Ln–O clusters in the presence of basic N-containing ligands,which exert a slow-releasing effect for Ln^(3+)ions in alkaline conditions.