Zhang Hai-Ning, Gao Wen-Xi, Lin Yue-Jian, Jin Guo-Xin
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry , Fudan University , Shanghai 200433 , P. R. China.
J Am Chem Soc. 2019 Oct 9;141(40):16057-16063. doi: 10.1021/jacs.9b08254. Epub 2019 Sep 25.
A template-free Cp*Ir-based molecular Solomon link and an unusual trefoil knot induced by stacking interactions were realized via selection of the nonrigid dipyridyl ligand 4,4'-bis(pyridin-4-ylmethyl)-1,1'-biphenyl (). In addition, a novel heterobimetallic tetranuclear (Ir + Ag) complex featuring argentophilic interaction was synthesized in high yield. Remarkably, the reversible topological transformation between the Solomon link and an unusual trefoil knot can be achieved by utilizing the chemical reactivity of silver(I) ions under mild conditions, as demonstrated by a detailed X-ray crystallographic study.
通过选择非刚性联吡啶配体4,4'-双(吡啶-4-基甲基)-1,1'-联苯，实现了一种无模板的基于Cp*Ir的分子所罗门环链以及由堆积相互作用诱导形成的不寻常三叶结。此外，还高产率合成了一种具有亲银相互作用的新型异双核四核（Ir + Ag）配合物。值得注意的是，通过详细的X射线晶体学研究表明，在温和条件下利用银（I）离子的化学反应性，可以实现所罗门环链与不寻常三叶结之间的可逆拓扑转变。
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