Jump to main content
Jump to site search

Issue 5, 2005
Previous Article Next Article

Luminescent digold ethynyl thienothiophene and dithienothiophene complexes; their synthesis and structural characterisation

Author affiliations

Abstract

A series of protected and terminal dialkynes with extended π-conjugation through the fused oligothienyl linker unit in the backbone, 2,5-bis(trimethylsilylethynyl)thieno[3,2-b]thiophene 1a, 5,5′-bis(trimethylsilylethynyl)dithieno[3,2-b:2′,3′-d]thiophene 1b, 2,5-bis(ethynyl)thieno[3,2-b]thiophene 2a, 5,5′-bis(ethynyl)dithieno[3,2-b:2′,3′-d]thiophene 2b, has been synthesized and characterised. The digold alkynyl complexes [(Ph3P)Au(C[triple bond, length as m-dash]C)(C6H2S2)(C[triple bond, length as m-dash]C)Au(PPh3)] 3a and [(Ph3P)Au(C[triple bond, length as m-dash]C)(C8H2S3)(C[triple bond, length as m-dash]C)Au(PPh3)] 3b have then been prepared by the reaction of two equivalents of Ph3PAuCl and a methanolic KOH solution of 1a and 1b, respectively. The complexes have been characterised spectroscopically. The crystal structures show that the gold centres adopt a linear two-coordinate geometry appropriate for Au(I) complexes. Within the crystals adjacent molecules are linked by Au⋯S intermolecular interactions in the range 3.48–3.89 Å, but there are no short Au⋯Au contacts. The absence of Au⋯Au interactions in solution is confirmed by UV/visible absorption and emission spectroscopy, the spectra being dominated by ligand-centred π–π* interactions.

Graphical abstract: Luminescent digold ethynyl thienothiophene and dithienothiophene complexes; their synthesis and structural characterisation

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Oct 2004, accepted on 12 Jan 2005 and first published on 31 Jan 2005


Article type: Paper
DOI: 10.1039/B415965A
Citation: Dalton Trans., 2005,0, 874-883
  •   Request permissions

    Luminescent digold ethynyl thienothiophene and dithienothiophene complexes; their synthesis and structural characterisation

    P. Li, B. Ahrens, N. Feeder, P. R. Raithby, S. J. Teat and M. S. Khan, Dalton Trans., 2005, 0, 874
    DOI: 10.1039/B415965A

Search articles by author

Spotlight

Advertisements