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Issue 25, 2016
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Synthesis and structural studies of 1,4-di(2-pyridyl)-1,2,3-triazole dpt and its transition metal complexes; a versatile and subtly unsymmetric ligand

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Abstract

The synthesis of the ‘click’ derived 1,4-di(2-pyridyl)-1,2,3-triazole (dpt) chelator/ligand from 2-azidopyridine and 2-ethynylpyridine using Cu(I) and TBTA by microwave assisted synthesis is presented. The complexes of the subtly unsymmetric dpt ligand with Cu(I), Pt(II), Co(II), and Ag(I) were structurally characterised by using conventional methods, as well as using single crystal and powder diffraction analysis. The results of the studies showed formation of discrete molecules displaying preferential binding of the d-metal cations through the pyridyl nitrogen N1 and the proximal triazolyl nitrogen N2 i.e. the 2-(1H-1,2,3-triazol-4-yl)pyridine or ‘regular' chelate moiety despite the presence of a second potential binding pocket i.e. the 2-(1H-1,2,3-triazol-1-yl)pyridine chelate or ‘inverse’ moiety. This binding selectivity was corroborated through the study of the self-assembly of dpt with Cu(I) and Ag(I) using 1H NMR titration in CD3CN solution, as well as using UV-Vis absorption titrations; the former showing a broadening of the proton peaks associated with that chelate pocket.

Graphical abstract: Synthesis and structural studies of 1,4-di(2-pyridyl)-1,2,3-triazole dpt and its transition metal complexes; a versatile and subtly unsymmetric ligand

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Publication details

The article was received on 12 Apr 2016, accepted on 20 May 2016 and first published on 20 May 2016


Article type: Paper
DOI: 10.1039/C6DT01416J
Citation: Dalton Trans., 2016,45, 10209-10221
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    Synthesis and structural studies of 1,4-di(2-pyridyl)-1,2,3-triazole dpt and its transition metal complexes; a versatile and subtly unsymmetric ligand

    E. P. McCarney, C. S. Hawes, S. Blasco and T. Gunnlaugsson, Dalton Trans., 2016, 45, 10209
    DOI: 10.1039/C6DT01416J

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