An M18L24 stellated cuboctahedron through post-stellation of an M12L24 core
An M18L24 stellated cuboctahedron through post-stellation of an M12L24 core
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DOI：
10.1038/nchem.1285
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发表时间：
2012-04-01
期刊：
影响因子：
21.8
通讯作者：
Fujita, Makoto
中科院分区：
文献类型：
--
作者：
Sun, Qing-Fu;Sato, Sota;Fujita, Makoto
数学家熟知的柏拉图多面体和阿基米德多面体最近被化学家在分子尺度上通过分别用金属离子（M）和有机配体（L）定义顶点和边来构建。在这里，我们报告的第一个合成的凹面“星状多面体”，通过延长其前体多面体的面，直到它们相交，形成额外的节点。我们的方法涉及形成一个M12L24立方八面体核心，其中每个链接器带有一个悬垂的配位体网站，随后能够结合一个额外的金属中心，形成星形M18L24立方八面体。在此后星座过程中，M12L24核心的正方形面通过侧基部分与额外的金属中心的配位而闭合，但它们在从顶点移除这些金属离子时重新打开。这种行为让人想起在球形病毒衣壳中发现的类似金属触发的门开关。
Platonic and Archimedean polyhedra, well-known to mathematicians, have been recently constructed by chemists at a molecular scale by defining the vertices and the edges with metal ions (M) and organic ligands (L), respectively. Here, we report the first synthesis of a concave-surface 'stellated polyhedron', constructed by extending the faces of its precursor polyhedron until they intersect, forming additional nodes. Our approach involves the formation of an M12L24 cuboctahedron core, the linkers of which each bear a pendant ligand site that is subsequently able to bind an additional metal centre to form the stellated M18L24 cuboctahedron. During this post-stellation process, the square faces of the M12L24 core are closed by coordination of the pendant moieties to the additional metal centres, but they are re-opened on removing these metals ions from the vertices. This behaviour is reminiscent of the analogous metal-triggered gate opening-closing switches found in spherical virus capsids.