Synthesis, crystal structure and photophysical properties of a series of new neutral iridium(III) complexes with 2-phenylpyridine

A series of new neutral iridium(III) complexes containing strong-field ancillary ligands, [Ir(ppy)2(PPh3)L] (ppy = 2-phenylpyridine, PPh3 = triphenylphosphine, L = NCS−, 1; N3-, 2; NCO−, 3), have been synthesized and fully characterized by 1H NMR, IR, ESI mass spectral and elemental analysis. The crystal structure of 1 has been determined by X-ray analysis. The photoluminescence (PL) spectra of 1–3 show emission maxima at 477, 489 and 485 nm, respectively, corresponding to blue light-emitting of 1 and blue-green light-emitting of 2 and 3. PL quantum yields (PLQYs) of 1–3 are 0.39, 0.13 and 0.43, respectively.

Graphical abstractNeutral iridium(III) complexes Ir(ppy)2(PPh3)L (L = NCS−, 1; N3−, 2; NCO−, 3) have been synthesized and characterized. Crystal structure of 1 has been determined. The photoluminescence spectra of 1–3 show emission maxima at 477, 489 and 485 nm, respectively. Photoluminescence quantum yields of 1–3 are 0.39, 0.13 and 0.43, respectively.Figure optionsDownload full-size imageDownload as PowerPoint slide