Metallosupramolecular self-assembly of a universal 3-ravel
Metallosupramolecular self-assembly of a universal 3-ravel
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DOI：
10.1038/ncomms1208
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发表时间：
2011-02-01
影响因子：
16.6
通讯作者：
Meehan, George V.
中科院分区：
文献类型：
--
作者：
Li, Feng;Clegg, Jack K.;Meehan, George V.
在超分子化学领域，已经报道了少数错综复杂的交织结构，它们在艺术和科学之间架起了桥梁。这些图案通常在纳米尺度上形成，显示出相当大的美丽和复杂性。然而，这种类型的新拓扑结构的生成仍然是一个非常重要的合成挑战。在这里，我们描述了一个离散的高度交织的met-al-losupermolecular大会的基础上，一个普遍的3-ravel图案的拓扑结构，但在超分子化学前所未有的合成。外来的，20个组件，[Fe 8L 12] ravel纠缠可以被认为是一个“分支结”，与个别分子显示左手或右手手性。通过单晶和粉末X射线衍射证实了该簇的形成。这种排列通过π-π相互作用和自然界使分子结构中的空隙最小化的倾向的有利组合而稳定。
In the realm of supramolecular chemistry, a small number of intricately interwoven structures that bridge the boundaries between art and science have been reported. These motifs, which typically form on the nanometre scale, display both considerable beauty and complexity. However, the generation of new topologies of this type has remained a very significant synthetic challenge. Here, we describe the synthesis of a discrete highly intertwined met-al-losupramolecular assembly based on a universal 3-ravel motif-a topology as yet unprecedented in supramolecular chemistry. The exotic, 20-component, [Fe8L12] ravel entanglement may be considered as a 'branched knot', with individual molecules displaying either left-or right-handed chirality. The formation of this cluster was demonstrated by single-crystal and powder X-ray diffraction. The arrangement is stabilized by a favourable combination of pi-pi interactions and Nature's tendency to minimize voids in molecular architectures.