Abstract
Chelating ligands based upon 8-(dimethylsilyl)quinoline have been synthesized and used to prepare complexes of Rh(III) and Ir(III) in which the ligand coordinates the metal through a combination of M-N and M-Si linkages. These types of complexes have been formed via oxidative addition of the Rh(I) or Ir(I) precursors across either an Si-H or Si-Si bond of the N,Si-chelating ligand, and both bis - and tris -chelated species have been characterized. We report here the first photophysical characterizations of this new class of complexes. Their photophysical properties suggest that substantial modifications, relative to ortho-metalated species, occur as a result of the highly covalent nature of M-Si bonds as compared to M-C bonds.
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