Fine tuning of emission color of iridium (III) complexes from yellow to red via substituent effect on 2-phenylbenzothiazole ligands: synthesis, photophysical, …

…, H Zeng, Y Meng, H Sun, S Liu, Z Lu, Y Huang…

Index: Li, Ming; Zeng, Hui; Meng, Yanyan; Sun, Huiqin; Liu, Song; Lu, Zhiyun; Huang, Yan; Pu, Xuemei Dalton Transactions, 2011 , vol. 40, # 27 p. 7153 - 7164

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Citation Number: 37

Abstract

Four novel iridium (III) complexes bearing biphenyl (7a–7c) or fluorenyl (7d) modified benzothiazole cyclometallate ligands are synthesized. In comparison with the yellow parent complex, bis (2-phenylbenzothiozolato-N, C2′) iridium (III)(acetylacetonate)[(pbt) 2Ir (acac)](λPLmax= 557 nm, φPL= 0.26), 7a–7d show 20–43 nm bathochromic shifted orange or red phosphorescence in solution, with maximum photoluminescence (PL) quantum ...