Study of the effect of the phosphane bridging chain nature on the structural and photophysical properties of a series of gold(I) ethynylpyridine complexes

Montserrat Ferrer, Albert Gutiérrez, Laura Rodríguez, Oriol Rossell, João C. Lima, Mercè Font-Bardia, Xavier Solans

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Abstract

Alkynyl AuI complexes of the type [Au(C≡CC 5H4N)(PPh3)] (1) [Au2(C≡ CC5H4N)2 (diphosphane)] [diphosphane = bis(diphenylphosphanyl)methane (2), bis(diphenylphosphanyl)isopropane] (3), bis(diphenylphosphanyl)acetylene (4), 1,2-bis(diphenylphosphanyl)ethane (5), 1,3-bis(diphenylphosphanyl)propane (6), 1,4-bis(diphenylphosphanyl)butane (7), 1,1′-bis(diphenylphosphanyl)ferrocene (8) and [Au3(C≡ CC5H4N)3(triphos)] [triphos = 1,1,1-tris(diphenylphosphanylmethyl)ethane] (9) were prepared by reaction of [Au(C≡CC5H4N)]n with the suitable phosphane. Determination of the X-ray crystal structures of several compounds bearing different carbon backbones between the phosphorus atoms reveals the influence of the nature of the phosphane spacer on the establishment of intra and/or intermolecular gold-gold interactions. The absorption and emission properties of the complexes were analysed by taking into account the presence or absence of intermetallic interactions. Although UV/Vis spectra show differences for compounds with intramolecular Au-Au contacts, a conclusive trend was not observed in the emission behaviour.

Original languageEnglish
Pages (from-to)2899-2909
Number of pages11
JournalEuropean Journal of Inorganic Chemistry
Issue number18
DOIs
Publication statusPublished - 1 Jun 2008

Keywords

  • Alkynes
  • Aurophilicity
  • Gold
  • Luminescence
  • Phosphanes
  • UV/Vis spectroscopy

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