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A promising class of blue–violet emitters based on a new functional core, the indenopyrazine group, has successfully been synthesized for the first time by substitution with bulky m-terphenyl side groups in the ortho, meta, or para positions. There are larger blue shifts in the UV–visible absorption and PL spectra of the synthesized ortho- and para-substituted derivatives than in those of the meta-substituted...
Treatment of the metal reagent IrCl3⋅nH2O with two equivalents of 2‐pyridyl pyrazole (N^N)H (3‐tert‐butyl‐5‐(2‐pyridyl) pyrazole, (bppz)H and 3‐trifluoromethyl‐5‐(2‐pyridyl) pyrazole, (fppz)H), afforded the isomeric IrIII metal complexes with a general formula cis‐[Ir(bppz)2Cl2]H (2 a), trans‐[Ir(bppz)2Cl2]H (3 a), cis‐[Ir(fppz)2Cl2]H (2 b), and trans‐[Ir(fppz)2Cl2]H (3 b). Single‐crystal X‐ray diffraction...
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