Self-Assembly of Nanoscale Supramolecular Truncated Tetrahedra

Two nanoscale truncated tetrahedra were synthesized via
Pt(II)-mediated self-assembly. The first resulted from the
reaction of 3 equiv of cis-Pt(PMe3)2(OTf)2 and 2 equiv of
1,3,5-tris(4-pyridylethynyl)benzene, giving a truncated tetrahedron with a diameter of approximately 25 Å. The second,
analogous structure was obtained by the self-assembly of
cis-Pt(PMe3)2(OTf)2 and 1,3,5-tris(4-pyridyl-trans-ethenyl)benzene. These two truncated tetrahedra were crystallized
after partially exchanging the counterion to cobalticarborane
for the X-ray structural analysis.

通过Pt(II)介导的自组装反应，成功合成了两例纳米级截角四面体。第一例由3当量的顺式-双(三甲基膦)二(三氟甲磺酰氧基)合铂(II)（cis-Pt(PMe3)2(OTf)2）与2当量的1,3,5-三(4-吡啶乙炔基)苯反应制得，其直径约为25埃。第二例为结构类似的截角四面体，由顺式-双(三甲基膦)二(三氟甲磺酰氧基)合铂(II)与1,3,5-三(4-吡啶基-反式-乙烯基)苯经自组装得到。将这两例截角四面体的抗衡离子部分替换为钴碳硼烷后进行结晶，以开展X射线结构分析。