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Heteroleptic tris-cyclometalated Ir (III) complexes supported by the o-carboranyl-pyridine (CBpy) as a novel CN chelating ligand were synthesized and characterized. While the CBpy ligand contributes to the electronic stabilization of complexes, their photophysical properties are dominated by 2-arylpyridine ligands.
Bae et al. (Tue,) studied this question.