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Issue 10, 2012
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Luminescent heterometallic gold–copper alkynyl complexes stabilized by tridentate phosphine

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Abstract

The reactions between trinuclear gold complex tppmAu3Cl3 (tppm = tris(diphenylphosphino)methane), arylacetylenes HC2C6H4X and Cu+ under basic conditions result in formation of the heterometallic complexes [tppm(AuC2C6H4X)3Cu]+, X = H (1), COOMe (2), CN (3), OMe (4), NH2 (5). These compounds belong to one structural motif and consist of the heterometallic {(AuC2C6H4X)3Cu} core stabilized by the tridentate phosphine. Compounds 1–5 were characterized by polynuclear NMR and IR spectroscopy, ESI-MS and single-crystal X-ray analysis. Luminescence properties of these complexes have been studied and revealed a substantial red shift of the emission maxima with the increase in the electron donicity of the alkynyl ligands substituents in the 550–680 nm range. The theoretical calculations of the electronic structures showed that variations of the substituents on the alkynyl ligands display very little effect on the molecular structural parameters but show appreciable influence on the orbital energies and luminescence characteristics of the compounds under study.

Graphical abstract: Luminescent heterometallic gold–copper alkynyl complexes stabilized by tridentate phosphine

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Publication details

The article was received on 08 Sep 2011, accepted on 05 Dec 2011 and first published on 23 Jan 2012


Article type: Paper
DOI: 10.1039/C2DT11710J
Citation: Dalton Trans., 2012,41, 2941-2949
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    Luminescent heterometallic gold–copper alkynyl complexes stabilized by tridentate phosphine

    J. R. Shakirova, E. V. Grachova, V. V. Gurzhiy, I. O. Koshevoy, A. S. Melnikov, O. V. Sizova, S. P. Tunik and A. Laguna, Dalton Trans., 2012, 41, 2941
    DOI: 10.1039/C2DT11710J

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