School of Chemistry, Building F11, The University of Sydney, New South Wales 2006, Australia.
Nat Commun. 2011 Feb 22;2:205. doi: 10.1038/ncomms1208.
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 metallosupramolecular assembly based on a universal 3-ravel motif-a topology as yet unprecedented in supramolecular chemistry. The exotic, 20-component, [Fe(8)L(12)] 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 π-π interactions and Nature's tendency to minimize voids in molecular architectures.
在超分子化学领域，已经有少量错综复杂的交织结构被报道，这些结构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，具有相当的美感和复杂性。然而，生成这种新型拓扑结构仍然是一个非常具有挑战性的合成难题。在这里，我们描述了一种基于通用 3 股绳状图案的离散高度交织的金属超分子组装体的合成，这种拓扑结构在超分子化学中尚属前所未有。这种由 20 个组件组成的奇异[Fe(8)L(12)]绳状缠结可以被认为是一个“分支结”，其中单个分子显示出左手或右手手性。通过单晶和粉末 X 射线衍射证明了该簇的形成。这种排列通过π-π 相互作用和自然界在分子结构中最小化空隙的趋势的有利组合来稳定。
