Near-Infrared Phosphorescent Iridium(III) Benzonorrole Complexes Possessing Pyridine-based Axial Ligands

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• 作者：Yogesh Kumar Maurya ; Takahiro Ishikawa ; Yasunori Kawabe ; Masatoshi Ishida ; Motoki Toganoh ; Shigeki Mori ; Yuhsuke Yasutake ; Susumu Fukatsu ; Hiroyuki Furuta
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：June 20, 2016
• 年：2016
• 卷：55
• 期：12
• 页码：6223-6230
• 全文大小：436K
• 年卷期：0
• ISSN：1520-510X

文摘

Novel near-infrared phosphorescent iridium(III) complexes based on benzo-annulated N-linked corrole analogue (termed as benzonorrole) were synthesized. The structures of the complexes revealed octahedral coordination geometries involving an organometallic iridium–carbon bond with two external axial ligands. Interestingly, the iridium(III) complex exhibits near-infrared phosphorescence at room temperature at wavelengths beyond 900 nm. The significant redshift of the emission, as compared to the corrole congener, is originated from the ligand-centered triplet character. The fine-tuning of the photophysical properties of the complexes was achieved by introducing electron-donating and electron-withdrawing substituents on the axial pyridine ligands.