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Terpyridine-based Metallo-organic Cage and Supramolecular Gelation by Coordination-driven Self-assembly and Host–guest Interaction

Abstract

Host-guest complexation based on terpyridine (tpy) three-dimensional (3D) metallo-cages received less attention due to the complicated structure and solubility issue. Herein, a three-armed metallo-organic ligand (L) was synthesized via three 120°-bent bis-tpy groups into rigid tetrakis-tpy core, which possesses one benzo-21-crown-7 (B21C7) for further host-guest interaction. The metallo-organic cages [M3L2] with molecular weight up to 13,000 Da and a giant cavity was prepared in near-quantitative yield by self-assembly of L with metal ions, such as Zn2+ and Fe2+. The 3D metallo-supramolecules were characterized and supported by NMR, DOSY, ESI-MS and TEM. Hosts [M3L2] were threaded through a difunctional alkylammonium salt by host–guest interactions to polymerize, and subsequently generate the novel metallo-gels between [Zn3L2] and bis-ammonium salt (N2).

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Publication details

The article was received on 18 Mar 2018, accepted on 15 May 2018 and first published on 16 May 2018


Article type: Paper
DOI: 10.1039/C8DT01044G
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Terpyridine-based Metallo-organic Cage and Supramolecular Gelation by Coordination-driven Self-assembly and Host–guest Interaction

    D. Liu, H. Liu, B. Song, M. Chen, J. Huang, J. Wang, X. Yang, W. Sun, X. Li and P. Wang, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT01044G

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