27973-29-1Relevant articles and documents
Synthesis and electro-optical properties of carbazole-substituted pyrene derivatives
Jeong, Seonju,Park, Sung Hwan,Kim, Ki-Soo,Kwon, Younghwan,Ha, Ki-Ryong,Choi, Byeong-Dae,Han, Yoon Soo
, p. 4351 - 4356 (2011)
Mono and dicarbazole-substituted pyrene derivatives, 9H-carbazol-9-ylpyrene (MCzP) and 1,6-di(9H-carbazol-9-yl)pyrene (DCzP), with dual-purpose function as a blue emitting and charge transporting layer in organic light emitting diodes, were synthesized and characterized. These series of molecules consisted of an electron donating (D) carbazole and an electron accepting (A) pyrene in D-A and D-A-D shapes. Non-doped blue electroluminescent devices with the configurations of ITO (150 nm)/α-NPD (30 nm)/DCzP (40 nm)/LiF (1 nm)/Al (150 nm) (D1) and ITO (150 nm)/2-TNATA (15 nm)/α-NPD (20 nm)/DCzP (40 nm)/BCP (15 nm)/Alq3(10 nm)/LiF (1 nm)/Al (120 nm) (D2) were fabricated. D1 and D2 devices showed blue emission at 492 nm and 488 nm, and maximum luminance of 840 and 7560 cd/m2 obtained at 13 V and 15 V, respectively. 2011 American Scientific Publishers Copyright
Electrophilic Substitution of Monosubstituted Pyrenes
Minabe, Masahiro,Takeshige, Shouji,Soeda, Yuuji,Kimura,Takao,Tsubota, Motohiro
, p. 172 - 179 (1994)
Bromination and Friedel-Crafts acetylation of monosubstituted pyrenes were examined.Acetylation of 1-acetyl- and 1-ethylpyrene occurred at the 8-, 6-, or 3-position, but the reaction of 1-methoxypyrene afforded only the 8- and 6-acetyl derivatives.By acetylation, 4-acetylpyrene yielded the 1- and 6-acetyl compounds, and 4-ethylpyrene gave the 6- and 8-derivatives.Also 4-bromopyrene afforded the corresponding 8-, 6-, and 1-acetyl derivatives by the same reaction.Bromination of 1-ethyl- and 4-ethylpyrene yielded the 8- and 6-bromides, but the reaction of 1-nitro- and 1-bromopyrene took place at the 6-, 8-, of 3-position.The formation ratio of these regioisomers differs by the substituents.The regioselectivity on the acetylation accords in some degree with the prediction based on the 13C NMR chemical shift of each position.The relative rates of these electrophilic substitutions correlate to the substituent constant, ?+, of the substituent attached to the pyrene.
A series of short axially symmetrically 1,3,6,8-tetrasubstituted pyrene-based green and blue emitters with 4-tert-butylphenyl and arylamine attachments
Zhang, Ran,Zhao, Yun,Zhang, Tengfei,Xu, Lu,Ni, Zhonghai
, p. 106 - 115 (2016)
A series of short axially symmetrically 1,3,6,8-tetrasubstituted pyrene-based derivatives (4a-4c) with two 4-tert-butylphenyl segments at 1,8-positions and two hole-transporting arylamine attachments at 3,6-sites of pyrene core were designed and synthesized based on stepwise synthetic strategy. These compounds were structurally characterized and their photoelectric properties were investigated by spectroscopy, electrochemical and theoretical studies. The results show that the incorporation of different arylamine units into pyrene core can tune the electronic structures of the compounds, and polysubstituted configuration of pyrene can effectively suppress the intermolecular π-π interactions and consequently leads to relatively high absolute fluorescence quantum efficiencies. These compounds exhibit high thermal stability and can form morphologically stable amorphous thin films with glass transition temperature in the range of 156-189 °C. Solution-processed non-doped green and blue organic light-emitting diodes with maximum luminance efficiencies 4.14 cd A-1 and 2.41 cd A-1 were achieved for 4b and 4c, respectively.
Novel phenylcarbazole type organic compounds and an organic electroluminescent device comprising the same
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Paragraph 0157-0160, (2021/06/09)
An organic compound represented by chemical formula 1 and an organic light emitting device including the same are provided. Chemical Formula 1.
Electron-Transfer-Induced Self-Assembly of a Molecular Tweezer Platform
Thakur, Khushabu,Wang, Denan,Mirzaei, Saber,Rathore, Rajendra
supporting information, p. 14085 - 14089 (2020/10/12)
The design and synthesis of a new molecular tweezer (T-tmp) with electron-rich pincers are reported. The stable monocationic radicals and self-assembled dimeric radicals of this molecular tweezer platform were prepared by chemical oxidative titration. With the aid of DFT calculations, it was found that the dimeric radicals with syn-syn-syn conformer has the most stable structure, with the hole primarily delocalized between parallel stacked pyrenyl groups.