Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Apr 16;26(22):5093-5099.
doi: 10.1002/chem.202000525. Epub 2020 Mar 31.

Template-Free Self-Assembly of Molecular Trefoil Knots and Double Trefoil Knots Featuring Cp*Rh Building Blocks

Wei-Long Shan  1   2 , Xiang Gao  1 , Yue-Jian Lin  1 , Guo-Xin Jin  1
Affiliations

Template-Free Self-Assembly of Molecular Trefoil Knots and Double Trefoil Knots Featuring Cp*Rh Building Blocks

Wei-Long Shan et al. Chemistry. .

Abstract

Understanding and controlling the topology of self-assembled structures plays a fundamental role in supramolecular chemistry. Herein, the preparation of a series of tetranuclear metallarectangles and hexanuclear trefoil knots featuring Cp*Rh building blocks by template-free self-assembly with four different rigid and flexible ligands is described. Transformations between the trefoil knots and the corresponding macrocycles can be induced by using concentration effects. Remarkably, the hexanuclear trefoil knot 5 was shown to assemble further to provide rare examples of [12+1] heteronuclear double trefoil knots (5 a/5 b/5 c/5 d) through coordination of the amide oxygen atoms to the secondary metal ions Na+ /K+ /Ca2+ /Cd2+ . The synthetic results are supported by single-crystal XRD.

Keywords: macrocycles; molecular knots; rhodium; self-assembly; supramolecular chemistry.

PubMed Disclaimer

References

    1. None
    1. J. F. Stoddart, Chem. Soc. Rev. 2009, 38, 1521-1529;
    1. T. R. Cook, Y.-R. Zheng, P. J. Stang, Chem. Rev. 2013, 113, 734-777;
    1. B. S. Pilgrim, D. A. Roberts, T. G. Lohr, T. K. Ronson, J. R. Nitschke, Nat. Commun. 2017, 8, 1276-1281;
    1. J. J. Danon, A. Krüger, D. A. Leigh, J.-F. Lemonnier, A. J. Stephens, I. J. Vitorica-Yrezabal, S. L. Woltering, Science 2017, 355, 159-162;

LinkOut - more resources