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Synthesis of non-symmetric viologen-containing ditopic ligands and their Pd(II)/Pt(II)-directed self-assembly

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Abstract

We present here an efficient method for the preparation of non-symmetric viologen-containing ditopic ligands, as well as the Pd(II)/Pt(II)-directed self-assembly of some of these into metallacyclic receptors. The designed synthetic route, that implies the sequential alkylation and the Zincke reaction of activated bipyridinium salts, allowed us to substantially improve the yield in the preparation of three previously reported ligands. The versatility and efficiency of the method have also been tested for the preparation of four new viologen-containing ligands with very different structural features. Furthermore, the self-assembly of the new ligands around Pd(II) and Pt(II) centers has been tested, yielding mononuclear rectangular-shaped metallacycles of different dimensions and electronic characteristics.

Graphical abstract: Synthesis of non-symmetric viologen-containing ditopic ligands and their Pd(ii)/Pt(ii)-directed self-assembly

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Publication details

The article was received on 20 Jan 2017, accepted on 23 Feb 2017 and first published on 23 Feb 2017


Article type: Paper
DOI: 10.1039/C7OB00161D
Citation: Org. Biomol. Chem., 2017, Advance Article
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    Synthesis of non-symmetric viologen-containing ditopic ligands and their Pd(II)/Pt(II)-directed self-assembly

    O. Domarco, I. Neira, T. Rama, A. Blanco-Gómez, M. D. García, C. Peinador and J. M. Quintela, Org. Biomol. Chem., 2017, Advance Article , DOI: 10.1039/C7OB00161D

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