Abstract
A series of gold(I) complexes containing diphenylphosphine bridging ligands, dppm, dppe, dpephos, dbfphos and biphep and co-ligands of the type pyrazole have been synthesized. The X-ray crystal structures of [Au 2(μ-dpephos)(μ-pz2CH3)][PF6], [Au 2(μ-dbfphos)(μ-pz2CH3)][PF6], and of the starting compound [Au2Cl2(μ-biphep)] indicate that the structural and stoichiometric characteristics of the new complexes depend on the diphosphine ligand. The three complexes show Au⋯Au contacts between 3.27 and 3.30 , with that of the biphep compound being the shortest. Digold (I)-diphosphine derivatives with a bridging pyrazolate ligand are obtained in all cases, except when [Au2Cl2(μ-biphep)] is used as starting material. Surprisingly, in this case, two monodentate neutral pyrazole ligands are attached to the gold atoms. The new complexes are luminescent in the solid state at 77 K and in solution both at room temperature and 77 K. Low energy emission bands related to the presence of Au⋯Au interactions have been identified in some of the compounds in the solid state and/or in solution.
Original language | English |
---|---|
Pages (from-to) | 2789-2796 |
Number of pages | 8 |
Journal | Journal of organometallic chemistry |
Volume | 696 |
Issue number | 15-16 |
DOIs | |
Publication status | Published - 01 Aug 2011 |
Keywords
- Aurophilic interactions
- Gold complexes
- Luminescent materials
- Pyrazolate-type ligands
- Pyrazole-type ligands
ASJC Scopus subject areas
- Biochemistry
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry