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

• Published in: Inorganic chemistry communications 2009-08, Vol.12 (8), p.785-788
• Main Authors: Shen, Xuan, Yang, Hao, Hu, Xiu-Hua, Xu, Yan, Wang, Feng-Ling, Chen, Su, Zhu, Dun-Ru
• Format: Article
• Language: English
• Subjects: Blue–green light emitting; Crystal structure; Neutral iridium(III) complexes; Photoluminescence; PL quantum yields; Strong-field ligands
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2009.06.017

Neutral iridium(III) complexes Ir(ppy) 2(PPh 3)L (L = NCS −, 1; N 3 −, 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. A series of new neutral iridium(III) complexes containing strong-field ancillary ligands, [Ir(ppy) 2(PPh 3)L] (ppy = 2-phenylpyridine, PPh 3 = triphenylphosphine, L = NCS −, 1; N 3 - , 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.