Self-assembly and photocatalytic H2 evolution activity of two unprecedented polytantalotungstates based on the largest {Ta18} and {Ta18Yb2} clusters.
Two unprecedented polytantalotungstates (POTTs), Cs16K16Na4[Ta18P12W90(OH)6(H2O)2O360]·24H2O (1) and Cs26K2H2[Yb2Ta18P12W90(OH)6(H2O)16O360]·52H2O (2) based on the largest {Ta18} and {Ta18Yb2} clusters, respectively, were hydrothermally synthesized. A photocatalytic study revealed that 1 and 2 exhibit significant ultraviolet photocatalytic water splitting activity.