High‐dimensional Polyoxoniobates Constructed from Lanthanide‐incorporated High‐nuclear {[Ln(H2O)4]3[Nb24O69(H2O)3]2} Secondary Building Units.

In this work, two rare high‐dimensional polyoxoniobates with formulas of H9[Cu(en)(H2O)2][Cu(en)2]8[Dy(H2O)4]3[Nb24‐O69(H2O)3]2 ⋅ 36H2O (1) and H9K[Cu(en)2(H2O)]5[Cu(en)2]4‐[Eu(H2O)4]3[Nb24O69(H2O)3]2 ⋅ 2en ⋅ 45H2O (2) have been obtained under hydrothermal conditions. These extended materials are constructed from lanthanide‐incorporated triangular‐prism‐like polyoxoniobate secondary building units (SBUs) {[Ln(H2O)4]3[Nb24O69(H2O)3]2} (Ln=Dy, Eu). 1 and 2 represent the first examples of high‐dimensional polyoxometalate materials based on such lanthanide‐incorporated triangular‐prism‐like polyoxoniobate SBUs. Furthermore, the proton conduction property and the luminescent emission of these materials were evaluated. [ABSTRACT FROM AUTHOR]