Homoleptic thiazole-based Ir<sup>III</sup> phosphorescent complexes for achieving both high EL efficiencies and an optimized trade-off among the key parameters of solution-processed WOLEDs

Guo, Haoran; Zhao, Jiang; Tian, Zhongmin; Wu, Yong; Liu, Boao; Dang, Feifan; Yang, Xiaolong; Zhou, Guijiang; Wu, Zhaoxin; Wong, Wai Yeung

doi:10.1039/c6tc04011j

Cited by 21 publications

(1 citation statement)

References 34 publications

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“…As one of the potential candidates for next-generation flat-panel displays and solid-state lighting, organic light-emitting diodes (OLEDs) have attracted numerous attentions from both academic and industrial communities owing to the low fabrication cost, high intrinsic efficiency, and other special virtues. , Among various promising phosphorescent emitters, Ir(III) complexes are of paramount importance, which is attributed to their high photoluminescence quantum yield (PLQY), short lifetime, and facile color tuning. , To date, the scarcity of blue-emitting phosphorescent OLEDs (PhOLEDs) is the block stone to realize the full color display. , …”

Section: Introductionmentioning

confidence: 99%

Comprehension of the Effect of a Hydroxyl Group in Ancillary Ligand on Phosphorescent Property for Heteroleptic Ir(III) Complexes: A Computational Study Using Quantitative Prediction

Wang¹,

Yang²,

Wen³

et al. 2017

Inorg. Chem.

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A new Ir(III) complex (dfpypya)Ir(pic-OH) (2) is theoretically designed by introduction of a simple hydroxyl group into the ancillary ligand on the basis of (dfpypya)Ir(pic) (1) with the aim to get the high-efficiency and stable blue-emitting phosphors, where dfpypya is 3-methyl-6-(2',4'-difluoro-pyridinato)pyridazine, pic is picolinate, and pic-OH is 3-hydroxypicolinic acid. The other configuration (dfpypya)Ir(pic-OH)' (3) is also investigated to compare with 2. The difference between 2 and 3 is whether the intramolecular hydrogen bond is formed in the (dfpypya)Ir(pic-OH). The quantum yield is determined by three different methods including the semiquantitative and quantitative methods. To quantitatively determine the quantum yield is still not an easy task to be completed. This work would provide some useful advices to select the suitable method to reliably evaluate the quantum yield. Complex 2 has larger quantum yield and more stability as compared with 1 and 3. The formation of intramolecular hydrogen bond would become a new method to design new phosphor with the desired properties.

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Section: Introductionmentioning

confidence: 99%

Comprehension of the Effect of a Hydroxyl Group in Ancillary Ligand on Phosphorescent Property for Heteroleptic Ir(III) Complexes: A Computational Study Using Quantitative Prediction

Wang¹,

Yang²,

Wen³

et al. 2017

Inorg. Chem.

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Reactivity of 4‐phenylthiazoles in ruthenium catalyzed direct arylations

Daher

Jacquemin

Guerchais

et al. 2019

Applied Organom Chemis

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The reactivity of the phenyl substituent of 4‐phenylthiazoles in Ru‐catalyzed direct arylation was studied. 4‐Phenylthiazole was found to be unreactive; whereas, the introduction of an aryl unit at C5‐position of 4‐phenylthiazole enhances its reactivity, allowing the selective mono‐arylation of the phenyl unit of 4‐phenylthiazoles in moderate to high yields using 5 mol% of [Ru(p‐cymene)Cl2]2 catalyst precursor associated to KOPiv as base. These results reveal that the conformation and electronic properties of 4‐phenylthiazoles are crucial to allow the formation of suitable intermediates in the course of the catalytic cycle. The reaction tolerated both electron‐rich and electron‐poor aryl bromides allowing the straightforward tuning of the electronic properties of the arylated 2‐methyl‐4‐phenyl‐5‐arylthiazoles.

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A Single‐Anion‐Based Red‐Emitting Cationic Diiridium(III) Complex Bearing a Pyrimidine‐Based Bridging Ligand for Oxygen Sensing

Shi

Zou

et al. 2018

Eur J Inorg Chem

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Compared with double‐anion‐based cationic diiridium complexes, the study of single‐anion‐based cationic diiridium complexes as emitters is largely unexplored. In this work, two methods were used to prepare single‐anion‐based cationic diiridium complex Ir‐Ir‐1 bearing 2‐pyrimidine‐benzimidazole as bridging ligand, both sides of which are symmetrical structures comprising 2‐phenylpyridine as cyclometalated ligand. It shows efficient red phosphorescence emission with redshift of the emission wavelength by 85 nm relative to the corresponding monoiridium complex Ir‐1. Moreover, it exhibits long emission lifetime and high oxygen sensitivity, which were attributed to the intraligand charge‐transfer excited state. Hence, Ir‐Ir‐1 was used as a oxygen probe to monitor intracellular O2 content by time‐resolved luminescence imaging.

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Homoleptic thiazole-based Ir^III phosphorescent complexes for achieving both high EL efficiencies and an optimized trade-off among the key parameters of solution-processed WOLEDs

Abstract: Optimized trade-off among high EL efficiency, stable CIE and high CRI in solution-processed WOLEDs with homoleptic thiazole-based IrIII metallophosphors.

Cited by 21 publications

References 34 publications

Comprehension of the Effect of a Hydroxyl Group in Ancillary Ligand on Phosphorescent Property for Heteroleptic Ir(III) Complexes: A Computational Study Using Quantitative Prediction

Comprehension of the Effect of a Hydroxyl Group in Ancillary Ligand on Phosphorescent Property for Heteroleptic Ir(III) Complexes: A Computational Study Using Quantitative Prediction

Reactivity of 4‐phenylthiazoles in ruthenium catalyzed direct arylations

A Single‐Anion‐Based Red‐Emitting Cationic Diiridium(III) Complex Bearing a Pyrimidine‐Based Bridging Ligand for Oxygen Sensing

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Homoleptic thiazole-based IrIII phosphorescent complexes for achieving both high EL efficiencies and an optimized trade-off among the key parameters of solution-processed WOLEDs

Abstract: Optimized trade-off among high EL efficiency, stable CIE and high CRI in solution-processed WOLEDs with homoleptic thiazole-based IrIII metallophosphors.

Cited by 21 publications

References 34 publications

Comprehension of the Effect of a Hydroxyl Group in Ancillary Ligand on Phosphorescent Property for Heteroleptic Ir(III) Complexes: A Computational Study Using Quantitative Prediction

Comprehension of the Effect of a Hydroxyl Group in Ancillary Ligand on Phosphorescent Property for Heteroleptic Ir(III) Complexes: A Computational Study Using Quantitative Prediction

Reactivity of 4‐phenylthiazoles in ruthenium catalyzed direct arylations

A Single‐Anion‐Based Red‐Emitting Cationic Diiridium(III) Complex Bearing a Pyrimidine‐Based Bridging Ligand for Oxygen Sensing

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Homoleptic thiazole-based Ir^III phosphorescent complexes for achieving both high EL efficiencies and an optimized trade-off among the key parameters of solution-processed WOLEDs