Department of Chemistry, University of California, Riverside, California 92521, USA.
J Am Chem Soc. 2012 Feb 29;134(8):3619-22. doi: 10.1021/ja210039u. Epub 2012 Feb 15.
Supertetrahedral Tn clusters are exact fragments of a cubic ZnS type lattice. Thus far, Tn clusters up to T4 with 20 metal sites can be synthesized in a discrete molecular form. Yet, synthesis of larger discrete supertetrahedral clusters still remains a great challenge, likely due to the rapidly increasing negative charge on the cluster as the size goes up. By using organic superbases (DBN and DBU) to help stabilize the negative charge, a family of discrete supertetrahedral chalcogenide clusters with sizes spanning from T3 (10 metal sites) to T5 (35 metal sites) have been made. The T5 cluster represents the largest molecular supertetrahedral Tn cluster known to date.
超四面体 Tn 簇是立方 ZnS 型晶格的精确片段。到目前为止，最多可以合成 20 个金属位的 Tn 簇 T4，以离散的分子形式存在。然而，更大的离散超四面体簇的合成仍然是一个巨大的挑战，这可能是由于随着尺寸的增加，簇上的负电荷迅速增加。通过使用有机超强碱（DBN 和 DBU）来帮助稳定负电荷，制备了一系列尺寸从 T3（10 个金属位）到 T5（35 个金属位）的离散的硫属元素化物超四面体簇。T5 簇是目前已知的最大的分子超四面体 Tn 簇。
