52889-50-6Relevant academic research and scientific papers
Functionalizing tetraphenylpyrazine with perylene diimides (PDIs) as high-performance nonfullerene acceptors
Li, Gang,Yang, Shufan,Liu, Tao,Li, Jiewei,Yang, Wenbin,Luo, Zhenghui,Yan, Cenqi,Li, Dandan,Wang, Xinyu,Cui, Guanwei,Yang, Tao,Xu, Liang,Zhan, Shun-Ze,Huo, Lijun,Yan, He,Tang, Bo
supporting information, p. 14563 - 14570 (2019/12/09)
Perylene diimide (PDI)-based small molecular acceptors with a three-dimensional structure are thought to be essential for efficient photocurrent generation and high power conversion efficiencies (PCEs). Herein, a couple of new perylene diimide acceptors (
Tetra pyridine pheryl pyrazine, and preparation method and applications thereof
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Paragraph 0032-0035, (2019/09/14)
The invention belongs to the technical field of organic polymer luminescent material, and provides tetra pyridine pheryl pyrazine which is used for solving problems in the prior art that conventionalaggregation-induction-induced emission ligand preparatio
Phosphine Supported Ruthenium Nanoparticle Catalyzed Synthesis of Substituted Pyrazines and Imidazoles from α-Diketones
Ganji, Prasad,Van Leeuwen, Piet W. N. M.
, p. 1768 - 1774 (2017/02/10)
A new methodology has been developed for the synthesis of highly substituted nitrogen heterocycles such as pyrazines and imidazoles starting from α-diketones using phosphine supported ruthenium nanoparticles (RuNPs) as catalysts. Ruthenium nanoparticles Ru1-Ru4 supported with different phosphines such as dbdocphos, dppp, DPEphos, and Xantphos are screened, of which Ru1 and Ru4 are found to be the most active. Interestingly, aryl-substituted and alkyl-substituted α-diketones produced different products: namely, pyrazine and imidazoles, respectively. This reaction methodology has been applied to the synthesis of a key intermediate (2m) of the marine cytotoxic natural product Dragmacidin B and an estrogen receptor (2l). This work represents the first examples of pyrazines prepared by RuNPs.
An Improved Synthesis of Multi-Substituted Pyrazines under Catalyst- and Solvent-Free Conditions
Tamaddon, Fatemeh,Tafti, Arefeh Dehghani,Pooramini, Farzaneh
, p. 4295 - 4299 (2016/11/26)
A one-pot pseudo four-component reaction between a variety of 2-hydroxy-1,2-diarylethanone derivatives and ammonium acetate or amines has been developed to synthesize substituted pyrazines under catalyst-free and solvent-free conditions. This procedure provides a synthetic method to access pyrazine derivatives in excellent yields under green conditions.
SnCl2·2H2O-Catalyzed Solvent-Free Synthesis of α-Amino Ketones and Tetrasubstituted Pyrazines
Tamaddon, Fatemeh,Dehghani Tafti, Arefeh
, p. 2217 - 2220 (2016/10/11)
Solvent-free reaction of various anilines with α-hydroxy ketones catalyzed by SnCl2·2H2O provides α-amino ketones in excellent yields. While a similar reaction with aliphatic amines is applicable for the synthesis of substituted pyrazines, SnCl2·2H2O permits versatility in the solvent-free reaction of α-hydroxy ketones with ammonium acetate to give the corresponding substituted pyrazines in good to excellent yields.
Triphenylamine-functionalized tetraphenylpyrazine: Facile preparation and multifaceted functionalities
Chen, Ming,Nie, Han,Song, Bo,Li, Lingzhi,Sun, Jing Zhi,Qin, Anjun,Tang, Ben Zhong
supporting information, p. 2901 - 2908 (2016/04/26)
Aggregation-induced emission (AIE) is a unique photo-physical phenomenon and has become an emerging and hot research area. With the enthusiastic efforts paid by researchers, hundreds of AIE-active luminogens (AIEgens) have been generated but heterocyclic AIEgens are rarely reported. Recently, we enriched the family of AIEgens and reported a pyrazine-based AIEgen of tetraphenylpyrazine (TPP), which could be facilely functionalized by a post-synthetic strategy. In this work, we further expanded the TPP-based AIE system by covalently attaching one, two or four electron-donating triphenylamine moieties to the TPP core via Suzuki coupling, and TPP-TPA, TPP-2TPA and TPP-4TPA were produced, respectively. Thanks to their donor-π-acceptor structures, these luminogens exhibit multi-functional properties, such as excellent thermal stability (up to 504°C), large molar absorptivity, bright emission in the solid state (quantum yields up to 35.2%), solvatochromism, and high two-photon absorption cross-sections (up to 480 GM). Furthermore, using TPP-TPA as the emitting layer, a triple-layer device was fabricated and a turn-on voltage, maximum luminance, current efficiency, power efficiency, and external quantum efficiency of 3.7 V, 17 459 cd m-2, 5.49 cd A-1, 3.18 lm W-1 and 2.88% were realized, respectively. These results indicate a huge potential to develop high-tech applications based on these TPP-based AIEgens.
