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Issue 13, 2017
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Self-assembly of dinuclear Pd(II)/Pt(II) metallacyclic receptors incorporating N-heterocyclic carbene complexes as corners

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Abstract

We report herein the self-assembly of a series of new square and rectangular-shaped dinuclear M2L2 metallacycles (M = Pd(II)/Pt(II)), receptors self-assembled in water from four different N-monoalkyl-4,4′-bipyridinium derivatives as ligands and square-planar Pd(II) and Pt(II) metal centers having the chelating N-heterocyclic carbene 1,1′-di(methyl)-3,3′-methylene-4-diimidazolin-2,2′-diylidene. The concentration-dependent Pd2L2 metallacycles were successfully obtained and characterized by means of NMR experiments in aqueous media. Due to the strong trans effect exerted by the carbene ligands, the synthesis of the Pt2L2 receptors was achieved as well by self-assembly of the components at room temperature in a few hours, in clear contraposition to the harsh reaction conditions usually required for the labilization of other kinetically inert Pt(II)–N(pyridine) bonds. X-ray diffraction studies of suitable single crystals of two of the obtained receptors offered additional information on the structure of the obtained supramolecules, whose ability as receptors has been explored by the preparation and study of the corresponding inclusion complexes in water with 1,5-dihydroxynaphthalene as the model substrate.

Graphical abstract: Self-assembly of dinuclear Pd(ii)/Pt(ii) metallacyclic receptors incorporating N-heterocyclic carbene complexes as corners

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Publication details

The article was received on 25 Nov 2016, accepted on 21 Feb 2017 and first published on 22 Feb 2017


Article type: Paper
DOI: 10.1039/C6DT04476J
Citation: Dalton Trans., 2017,46, 4182-4190
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    Self-assembly of dinuclear Pd(II)/Pt(II) metallacyclic receptors incorporating N-heterocyclic carbene complexes as corners

    I. Marcos, O. Domarco, C. Peinador, A. Fenández, J. J. Fernández, D. Vázquez-García and M. D. García, Dalton Trans., 2017, 46, 4182
    DOI: 10.1039/C6DT04476J

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