Two luminescent iridium complexes with phosphorous ligands and their photophysical comparison in solution, solid and electrospun fibers: Decreased aggregation-caused emission quenching by steric hindrance

doi:10.3390/ma14185419

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	Two luminescent iridium complexes with phosphorous ligands and their photophysical comparison in solution, solid and electrospun fibers: Decreased aggregation-caused emission quenching by steric hindrance
	C. Huang and B. Li
	2021
发表期刊	Materials
ISSN	19961944
卷号	14 期号:18
摘要	In this paper, we prepared two phosphorescent Ir complexes with ligands of 2-phenyl pyridine (ppy), and two phosphorous ligands with large steric hindrance, hoping to allow enough time for the transformation of the highly phosphorescent3MLLCT (metal-to-ligand-ligand-charge-transfer) excited state. Their large steric hindrance minimized the - interaction between complex molecules, so that the aggregation-induced phosphorescence emission (AIPE) influence could be minimized. Their single crystals indicated that they took a distorted octahedral coordination mode. Photophysical comparison between these Ir complexes in solution, in the solid state and in electrospun fibers was performed to confirm the realization of limited aggregation-caused quenching (ACQ). The potential surface crossing and energy transfer from3MLBPECT/3MLBPELppyCT to3MLppyCT in these Ir complexes were revealed by density functional theory calculation and temperature-dependent emission. It was confirmed that these two phosphorous ligands offered large steric hindrance, which decreased the ACQ effect, allowing the efficient emissive decay of the3MLppyCT excited state. This is one of the several luminescent Ir complexes with a high emission yield ( = 0.27) and long emission lifetime (0.43 s) in the solid state. 2021 by the authors. Licensee MDPI, Basel, Switzerland.
DOI	10.3390/ma14185419
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收录类别	SCI ; EI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65722
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	C. Huang and B. Li. Two luminescent iridium complexes with phosphorous ligands and their photophysical comparison in solution, solid and electrospun fibers: Decreased aggregation-caused emission quenching by steric hindrance[J]. Materials,2021,14(18).
APA	C. Huang and B. Li.(2021).Two luminescent iridium complexes with phosphorous ligands and their photophysical comparison in solution, solid and electrospun fibers: Decreased aggregation-caused emission quenching by steric hindrance.Materials,14(18).
MLA	C. Huang and B. Li."Two luminescent iridium complexes with phosphorous ligands and their photophysical comparison in solution, solid and electrospun fibers: Decreased aggregation-caused emission quenching by steric hindrance".Materials 14.18(2021).

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