A series of high-nuclear planar equilateral triangle-shaped {Ln_(6)(μ_(3)-OH)_(6)} cluster encapsulated polyoxoniobates with frequency dependent magnetic property

The integration of lanthanide(Ln)ions and polyoxoniobates(PONbs)is challenging,and the know Ln-substituted PONbs are still scarce.This work introduces high-nuclear iso-Ln-oxo clusters into th PONb system.The first series of high-nuclear Ln-oxo clusters encapsulated heterometallic polyoxonio bates H_9[Na(H_(2)O)_(4)][Cu(en)_(2)]_(10){Ln_6(μ_(3)-OH)_6(Si Nb_(18)O_(54))_(3)}·18H_(2)O(1-Ln,en=ethylenediamine,Ln=Dy,Gd Tb,Ho,Er,Tm,Yb,Lu)based on flower-like{Ln_(6)(μ_(3)-OH)_(6)(Si Nb_(18)O_(54))_(3)}({Ln_6Si_(3)Nb_(54)})clusters hav been successfully synthesized via one-pot hydrothermal synthesis strategy.The flower-like polyoxoanio{Ln_6Si_(3)Nb_(54)}is consisted of three heteropolyoxoniobate{Si Nb_(18)O_(54)}clusters and one unique planar equ lateral triangle-shaped{Ln_6(μ_(3)-OH)_6}cluster,which presents the highest nuclear iso-Ln-oxo cluster i PONb chemistry.In{Ln_6(μ_(3)-OH)_6}cluster,each pair ofμ_(3)-OH groups link three Dy^(3+)ions to form a sma approximate equilateral triangle-shaped{Dy_(3)(OH)_(2)}cluster.Furthermore,the three{Dy_(3)(OH)_(2)}cluster comprise a bigger approximate equilateral triangle-shaped{Dy_6(μ_(3)-OH)_6}cluster.The reported hexanu clear{Ln_6}cluster skeletons are mostly octahedral,however,such equilateral triangle-shaped skeleton o the hexanuclear Ln-oxo cluster is first observed.The 1-Dy exhibits good water vapor adsorption capacit and ferromagnetic properties.