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The preparation and photophysical properties of new phosphorescent iridium(III) emitters are reported. The metal center is encapsulated by a hexadentate ligand made up of three different bidentate fragments: orthometalated 2-phenylpyridine, orthometalated 2-benzylpyridine, and metalated 2-ethylpyridine. Their formation involves activation reactions of C(sp 2 )–H and C(sp 3 )–H bonds assisted by pyridyl groups.
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Benavent et al. (2023) studied this question.
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