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Angela M Kuchison1, Michael O Wolf, Brian O Patrick

  • 1Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver BC, Canada V6T 1Z1.

Chemical Communications (Cambridge, England)
|December 22, 2009
PubMed
Summary

A gold(I) complex with a terthienyl diphosphine ligand is non-emissive as a crystal. Grinding the complex activates intense ligand-based emission due to enhanced planarization of the terthienyl ligand.

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Area of Science:

  • Organometallic Chemistry
  • Materials Science
  • Photophysics

Background:

  • Gold(I) complexes are known for their diverse applications in catalysis and materials science.
  • Terthienyl ligands offer unique electronic and photophysical properties.
  • Solid-state luminescence is crucial for developing advanced optical materials.

Purpose of the Study:

  • To investigate the photophysical properties of a gold(I) complex featuring a terthienyl diphosphine ligand.
  • To explore the effect of mechanical stimuli on the luminescence of the complex.
  • To understand the structural factors influencing emission in the solid state.

Main Methods:

  • Synthesis and characterization of the gold(I)-terthienyl diphosphine complex.
  • Solid-state photoluminescence spectroscopy (emission and excitation).
  • Powder X-ray diffraction (PXRD) to analyze crystalline and ground states.
  • Computational modeling to assess ligand planarization.

Main Results:

  • The complex is non-emissive in its crystalline form.
  • Mechanical grinding induces intense ligand-based emission.
  • Grinding leads to increased planarization of the terthienyl ligand, confirmed by PXRD and computational analysis.
  • The observed emission is attributed to the disruption of intermolecular interactions and enhanced planarity in the amorphous/ground state.

Conclusions:

  • Mechanical force can activate luminescence in non-emissive gold(I) complexes.
  • Ligand planarity plays a critical role in achieving solid-state emission.
  • This finding opens avenues for designing mechanoluminescent materials based on organometallic complexes.