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Issue 39, 2012
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[2]Catenanes and inclusion complexes derived from self-assembled rectangular PdII and PtII metallocycles

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Abstract

New inclusion complexes and [2]catenanes were self-assembled from a fluorescent diazapyrenium based ligand, a PdII or PtII complex, and cyclic or acyclic electron rich aromatic guests in aqueous and organic media. The molecular rectangles display a π-deficient cavity suitable to incorporate π-donor aromatic systems. The inclusion complexes between the metallocycles and phenylenic (2a,b) and naphthalenic (3a,b–5a,b) derivatives were studied by NMR, UV-vis and fluorescence spectroscopy. The crystal structure of (3b) ⊂ 1a·6PF6 confirmed the insertion of the guest into the cavity of the metallocycle. Following the same self-assembly strategy, the use of polyethers 6,7 as π-donors resulted in the self-assembly of the [2]catenanes 1a(6,7)·6PF6. Single-crystal X-ray analysis of 1a(7)·6PF6 revealed the [2]catenane structure being stabilized by π-stacking and [C–H⋯O] interactions.

Graphical abstract: [2]Catenanes and inclusion complexes derived from self-assembled rectangular PdII and PtII metallocycles

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Publication details

The article was received on 23 May 2012, accepted on 03 Jul 2012 and first published on 03 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT31116J
Citation: Dalton Trans., 2012,41, 11992-11998
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    [2]Catenanes and inclusion complexes derived from self-assembled rectangular PdII and PtII metallocycles

    C. Alvariño, A. Terenzi, V. Blanco, M. D. García, C. Peinador and J. M. Quintela, Dalton Trans., 2012, 41, 11992
    DOI: 10.1039/C2DT31116J

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