Function and Property of Columnar Trinuclear Metal Clusters

为了评价金属离子团簇的电子传输能力，必须在合成过程中精确控制组成金属离子的数目和排列。我们通过将三个三核Au(I)_3络合物层叠在有机柱撑配位笼中，成功地制备了Au_9离子簇。此外，通过交替层叠三核Au(I)_3络合物和两个Ag(I)离子，形成了Au_3-Ag-Au_3-Ag-Au_3杂离子簇合物。通过X射线晶体分析明确确定了这些簇合物的结构。Au_3n离子簇(n=1-3)的单分子电导远高于芳香族分子(4，5-吡喃二酮)的π-堆栈，并且具有较长的电子传输能力。

To evaluate electron transport ability of metal ion clusters, the number and arrangement of the constituent metal ions must be precisely controlled in the synthesis. We succeeded in preparing Au_9 ion clusters by layering three molecules of trinuclear Au(I)3 complexes within an organic-pillared coordination cage. Moreover, by layering three trinuclear Au(I)3 complexes and two Ag(I) ions alternatively, a triple-decker Au_3-Ag-Au_3-Ag-Au_3 hetero ion cluster was constructed. These cluster structures were unambiguously determined by X-ray crystallographic analysis. Au3n ion clusters (n = 1-3) exhibited much higher values in the single-molecule conductance than π-stacks of aromatic molecules (4,5-pyrenedione) and enabled a long electron transport.