Near-infrared luminescence at room temperature of two new osmium(II) terdentate polypyridine complexes

Abstract

A new terdentate polypyridine ligand, 2,6-bis(7′-methyl-4′-phenyl-2′-quinolyl)pyridine (bmpqpy), its N–C–N cyclometallating homologue, 1,3-bis(7′-methyl-4′-phenyl-2′-quinolyl)benzene (Hbmpqb), and the two new complexes [Os(bmpqpy)₂][PF₆]₂ 1 and [Os(bmpqpy)(bmpqb)][PF₆] 2 are synthesized; to our knowledge, complexes 1 and 2 are the first osmium mononuclear complexes exhibiting room-temperature luminescence at > 840 nm.