Near-infrared emission from binuclear platinum (II) complexes containing pyrenylpyridine and pyridylthiolate units: Synthesis, photo-physical and electroluminescent properties

Novel binuclear platinum (II) complexes of (R-pypy)2Pt2(pyt)2 were synthesized based on the substituted pyrenylpyridine (R-pypy, R = H, tBu) and pyridine-2-thiolate (pyt). Intrinsic near-infrared electroluminescent peaks at 692 and 753 nm were observed in the (tBupypy)2Pt2(pyt)2 doped polymer light-emitting diodes with an increasing external quantum efficiency of 0.74%.180