Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Japan.
J Am Chem Soc. 2012 Jan 18;134(2):816-9. doi: 10.1021/ja209634g. Epub 2011 Dec 27.
The structures of nanomaterials determine their individual properties and the suprastructures they can form. Introducing anisotropic shapes and/or interaction sites to isotropic nanoparticles has been proposed to extend the functionality and possible suprastructure motifs. Because of symmetric anisotropy, Platonic solids with regular polygon faces are one of the most promising nanoscale structures. Introduction of Platonic solid anisotropy to isotropic nanomaterials would expand the functionality and range of possible suprastructure motifs. Here, we demonstrate a novel strategy to obtain nano-Platonic solids through the face coordination of square porphyrins on an inscribed Au sphere with adequate size. The face coordination of the multidentate porphyrin derivatives, with four acetylthio groups facing the same direction, on the Au cluster encased the Au cluster in a Platonic hexahedron with six porphyrin faces. Transmission electron microscopy, mass spectrometry, elemental analysis, and scanning tunnelling microscopy were used to confirm the formation of the nano-Platonic hexahedron.
纳米材料的结构决定了它们的个体性质和能够形成的超结构。向各向同性纳米粒子引入各向异性形状和/或相互作用位点，被认为可以扩展其功能和可能的超结构基元。由于具有对称各向异性，具有正多边形面的柏拉图固体是最有前途的纳米级结构之一。将柏拉图固体各向异性引入各向同性纳米材料中，将扩展其功能和可能的超结构基元的范围。在这里，我们展示了一种通过具有适当尺寸的内接 Au 球上的方形卟啉的面配位获得纳米柏拉图固体的新策略。多齿卟啉衍生物的面配位，四个乙酰硫基基团朝向同一方向，在 Au 团簇上包围 Au 团簇，形成具有六个卟啉面的柏拉图六面体。透射电子显微镜、质谱、元素分析和扫描隧道显微镜用于证实纳米柏拉图六面体的形成。
