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A cyclic bis[2]catenane metallacage.

ABSTRACT: Catenated cages represent chemistry's challenging synthetic targets because a three-dimensional assembly is necessary for their formation. Herein, a cyclic bis[2]catenane is constructed through the coordination-driven self-assembly of the interlocked bis-metallacage, by the 90° Pt(II) heteroligation of the endo-functionalized double-bridged tweezer bearing pyridyl moieties and the tetra-carboxylated linker. NMR spectrometry, X-ray crystallography and mass spectrometry confirm the formation of a cyclic bis[2]catenane with "?"-shaped topology via a 14-component self-assembly. Particularly, reversibly responsive transformation between the bis[2]catenane and the bis-metallacage can be realized by guest exchange, concentration effect and solvent effect. This work represents a novel example of a cyclic cage-based [2]catenane oligomer.

SUBMITTER: Wang Y

PROVIDER: S-EPMC7264200 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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A cyclic bis[2]catenane metallacage.

Wang Yiliang Y Zhang Yicheng Y Zhou Zhixuan Z Vanderlinden Ryan T RT Li Bin B Song Bo B Li Xiaopeng X Cui Lei L Li Jian J Jia Xueshun X Fang Jianhui J Li Chunju C Stang Peter J PJ

Nature communications 20200601 1

Catenated cages represent chemistry's challenging synthetic targets because a three-dimensional assembly is necessary for their formation. Herein, a cyclic bis[2]catenane is constructed through the coordination-driven self-assembly of the interlocked bis-metallacage, by the 90° Pt(II) heteroligation of the endo-functionalized double-bridged tweezer bearing pyridyl moieties and the tetra-carboxylated linker. NMR spectrometry, X-ray crystallography and mass spectrometry confirm the formation of a ...[more]

PMID: 32483119

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