169565-90-6Relevant academic research and scientific papers
An efficient exciton harvest route for high-performance OLEDs based on aggregation-induced delayed fluorescence
Yu, Ling,Wu, Zhongbin,Xie, Guohua,Zhong, Cheng,Zhu, Zece,Ma, Dongge,Yang, Chuluo
, p. 1379 - 1382 (2018)
We managed to integrate the features of aggregation-induced emission (AIE) and thermally activated delayed fluorescence (TADF), by introducing a fluorine atom into the quinoxaline system for highly efficient fluorescent OLEDs. With a purposive design and well-controlled synthesis, two novel AIE-TADF compounds were demonstrated and characterized. Monofluoro-substituted SFDBQPXZ exhibited high efficiencies in a doped OLED with a maximum EQE of 23.5%, a maximum current efficiency (CE) of 78.3 cd A-1 and a maximum power efficiency (PE) of 91.1 lm W-1. Noteworthily, by employing SFDBQPXZ as an orange emitter in a non-doped device, we have realized a considerably high EQE over 10%. The high efficiency and low roll-off in the doped or non-doped devices make our strategy promising and meaningful for OLED applications.
Quinoxaline-based cyclo(oligophenylenes)
Marin, Lidia,Kudrjasova, Julija,Verstappen, Pieter,Penxten, Huguette,Robeyns, Koen,Lutsen, Laurence,Vanderzande, Dirk J. M.,Maes, Wouter
, p. 2425 - 2430 (2015)
A series of fully conjugated quinoxaline-based oligophenylene macrocycles is synthesized by Ni0-mediated Yamamoto-type diaryl homocoupling of (fluorinated) 2,3-bis(4'-bromophenyl)quinoxaline precursors. Cyclotrimers and cyclotetramers are obtained as the dominant reaction products. The cyclooligomers are fully characterized, including single-crystal X-ray structures, and their optoelectronic properties are analyzed with respect to possible applications in host-guest chemistry and organic electronics.
In water organic synthesis: Introducing itaconic acid as a recyclable acidic promoter for efficient and scalable synthesis of quinoxaline derivatives at room temperature
Tamuli, Kashyap J.,Nath, Shyamalendu,Bordoloi, Manobjyoti
supporting information, p. 983 - 1002 (2021/02/27)
Substituted quinoxaline derivatives are traditionally synthesized by co-condensation of various starting materials. Herein, we describe a novel environmentally benign in water synthetic route for the synthesis of structurally and electronically diverse ninety quinoxalines with readily available substituted o-phenylenediamine and 1,2-diketones using cheap and biodegradable itaconic acid as a mild acid promotor in 1 hours. The reaction is performed at room temperature, which proceeds through cyclo-condensation reaction followed by obtaining the aforesaid nitrogen-containing heterocyclic adducts without performing the column chromatography up to 96% total yields. The simplicity, high efficiency, and reusable of the catalyst merits this reaction condition as “green synthesis” which enables it to be useful in synthetic transformations upto gram scale level.
A quinoxaline unit containing organic thermal delay fluorescent material and its application
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Paragraph 0059; 0061; 0062; 0063; 0064, (2018/12/13)
The invention relates to a quinoxaline unit containing organic thermally activated delayed fluorescent material and an application thereof. The organic thermally activated delayed fluorescent material, which contains a quinoxaline unit and has good light
An efficient synthesis of quinoxaline derivatives mediated by stannous chloride
Shi, Da-Qing,Dou, Guo-Lan,Ni, Sai-Nan,Shi, Jing-Wen,Li, Xiao-Yue
experimental part, p. 1797 - 1801 (2009/05/31)
(Chemical Equation Presented) Various biologically important quinoxaline derivatives were efficiently synthesized in excellent yields by the reaction of 1,2-diketones and 2-nitroaniline, benzofuroxan or 1,2-dinitrobenzene promoted by SnCl2·2H2O. The role of stannous chloride is acting as both reductive agent and catalyst in this synthesis. This new method has the advantages of accessible starting materials, convenient manipulation, short reaction time and high yields.
