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Issue 5, 2011
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Cation-induced molecular motion of spring-like [2]catenanes

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The syntheses and cation recognition studies of two novel heteroditopic [2]catenanes that are capable of reversible rotary motion are described. Prepared by chloride anion templation, both catenanes possess a calixdiquinone unit able to bind Na+, K+, NH4+ and Ba2+ cations. Following characterization of the chloride salts of both catenanes by NMR, mass spectrometry and crystal structure determination, hexafluorophosphate salts were investigated for their behaviour upon addition of cations. Ba2+ complexation caused a partial intra-ring rotation of the two macrocycles in both species, which was reversed upon addition of the sequestering SO42 anion.

Graphical abstract: Cation-induced molecular motion of spring-like [2]catenanes

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The article was received on 20 Jan 2011, accepted on 23 Feb 2011 and first published on 08 Mar 2011

Article type: Edge Article
DOI: 10.1039/C1SC00034A
Chem. Sci., 2011,2, 922-927

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    Cation-induced molecular motion of spring-like [2]catenanes

    A. V. Leontiev, C. J. Serpell, N. G. White and P. D. Beer, Chem. Sci., 2011, 2, 922
    DOI: 10.1039/C1SC00034A

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