Phosphorescent Cationic Iridium(III) Complexes with 1,3,4-Oxadiazole Cyclometalating Ligands: Solvent-Dependent Excited-State Dynamics
文献类型：期刊论文
| 作者 | Kuang, Zhuoran1,2; Wang, Xian1,2; Wang, Zhen3; He, Guiying1,2; Guo, Qianjin1; He, Lei3; Xia, Andong1,2 |
| 刊名 | CHINESE JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 30期号:3页码:259-267 |
| 关键词 | Iridium Complex Phosphorescence Metal-to-ligand Charge Transfer Transient Absorption Solvation |
| 英文摘要 | To elucidate the nature of low-lying triplet states and the effect of ligand modifications on the excited-state properties of functional cationic iridium complexes, the solvent dependent excited-state dynamics of two phosphorescent cationic iridium(III) complexes, namely [Ir(dph-oxd) (2) (bpy)PF6 (1) and [Ir(dph-oxd) (2) (pzpy)PF6 (2), were investigated by femtosecond and nanosecond transient absorption spectroscopy. Upon photoexcitation to the metal-to-ligand charge-transfer (MLCT) states, the excited-state dynamics shows a rapid process (tau=0.7-3 ps) for the formation of solvent stabilized (MLCT)-M-3 states, which significantly depends on the solvent polarity for both 1 and 2. Sequentially, a relatively slow process assigned to the vibrational cooling/geometrical relaxation and a long-lived phosphorescent emissive state is identified. Due to the different excited-state electronic structures regulated by ancillary ligands, the solvation-induced stabilization of the (MLCT)-M-3 state in 1 is faster than that in 2. The present results provide a better sight of excited-state relaxation dynamics of ligand-related iridium(III) complexes and salvation effects on triplet manifolds. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39074]  |
| 专题 | 化学研究所_光化学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kuang, Zhuoran,Wang, Xian,Wang, Zhen,et al. Phosphorescent Cationic Iridium(III) Complexes with 1,3,4-Oxadiazole Cyclometalating Ligands: Solvent-Dependent Excited-State Dynamics[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2017,30(3):259-267. |
| APA | Kuang, Zhuoran.,Wang, Xian.,Wang, Zhen.,He, Guiying.,Guo, Qianjin.,...&Xia, Andong.(2017).Phosphorescent Cationic Iridium(III) Complexes with 1,3,4-Oxadiazole Cyclometalating Ligands: Solvent-Dependent Excited-State Dynamics.CHINESE JOURNAL OF CHEMICAL PHYSICS,30(3),259-267. |
| MLA | Kuang, Zhuoran,et al."Phosphorescent Cationic Iridium(III) Complexes with 1,3,4-Oxadiazole Cyclometalating Ligands: Solvent-Dependent Excited-State Dynamics".CHINESE JOURNAL OF CHEMICAL PHYSICS 30.3(2017):259-267. |
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来源：化学研究所
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