我室孔祥建教授在 Small methods 上发表论文：A Giant 3d‐4f Polyoxometalate Super‐Tetrahedron with High Proton Conductivity

文章链接：https://onlinelibrary.wiley.com/doi/10.1002/smtd.202000777

摘要：The assembly of gigantic heterometallic metal clusters remains a great challenge for synthetic chemistry. Herein, based on the slow release strategy of lanthanide ions and in situ formation of lacunary polyoxometalates, two giant 3d‐4f polyoxometalate inorganic clusters [LaNi₁₂W₃₅Sb₃P₃O₁₃₉(OH)₆]²³⁻ (LaNi₁₂) and [La₁₀Ni₄₈W₁₄₀Sb₁₆P₁₂O₅₆₈(OH)₂₄(H₂O)₂₀]⁸⁶⁻ (La₁₀Ni₄₈) are obtained. The nanoscopic inorganic cluster La₁₀Ni₄₈ possesses a super tetrahedron structure, which can be viewed as assembly from four LaNi₁₂ molecules encapsulating a central [La₆(SbO₃)₄(H₂O)₂₀]⁶⁺ octahedron core. This giant aesthetic La₁₀Ni₄₈ tetrahedron containing 214 metal ions is the largest 3d‐4f cluster reported thus far in polyoxometalate system. More interestingly, the LaNi₁₂ and La₁₀Ni₄₈ display high stability in solution and La₁₀Ni₄₈ displays excellent proton conductivity.