N-heterocyclic carbene ligands as modulators of luminescence in three-coordinate gold(I) complexes with spectacular quantum yields
- Visbal, R. 2
- Ospino, I. 2
- López-De-Luzuriaga, J.M. 1
- Laguna, A. 2
- Gimeno, M.C. 2
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1
Universidad de La Rioja
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2
Instituto de Síntesis Química y Catálisis Homogénea
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ISSN: 0002-7863
Any de publicació: 2013
Volum: 135
Número: 12
Pàgines: 4712-4715
Tipus: Article
Altres publicacions en: Journal of the American Chemical Society
Resum
The first three-coordinate gold(I) N-heterocyclic carbene (NHC) complexes have been prepared with the nido-carborane diphosphine. The complexes are brightly luminescent and present very high quantum yield values. The carbene ligand is able to modulate the energy of the emissions and, depending upon the substituent, the luminescence changes from blue to green. Theoretical calculations corroborate that the emissions are phosphorescence and arise from charge transfer (LML′CT) transitions from nido-carborane ligand (L) to metal/ligand group "gold(I)-NHC ligand" (ML′). © 2013 American Chemical Society.