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| - Highly Efficient, Selective, and General Method for the Preparation ofMeridional Homo- and Heteroleptic Tris-cyclometalated IridiumComplexes
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| - The reaction of halide-bridged dinuclear bis-cyclometalated iridium complexes with an organozinc reagent bearing a cyclometalating ligand produces exclusively the corresponding meridional tris-cyclometalated iridium complexes in high yields. The molecular structure of mer-Ir(1-piq)2(ppy) (1-piq = 1-phenylisoquinoline; ppy = 2-phenylpyridine) has been determined. A hypsochromic shift in emission of mer-Ir(1-piq)(ppy)2 compared to mer-Ir(1-piq)2(ppy) is interpreted based on the coordination environment of the 1-piq ligand in the complex.
- A highly efficient and general method based on transmetalationwith an organozinc reagent is developed for selective preparationof homo- and heteroleptic meridional tris-cyclometalated iridiumcomplexes. The molecular structure of mer-Ir(1-piq)2(ppy) (2) hasbeen determined by a single-crystal X-ray diffraction analysis. Theemission properties of a series of meridional complexes arereported.
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